TEXT: 50 Area-Combat Elements
  [1] Sand or loose gravel. Can be thrown in 
  people's faces or to loosen footing.
  [2] Barrels or boulders atop a slope. If cut or 
  shoved loose will roll down at people below.
  [3] Hanging chandeliers, ropes, or vines. Can 
  swing across them over enemies or drop down 
  onto them from above.
  [4] Tables. Can be flipped to use as cover, or can 
  be jumped on for swashbuckling.
  [5] Activate forge, oven, or fireplace. Can try to 
  shove people into it to light them on fire, or pull 
  pokers/hot iron bars out of the fire.
  [6] Sentry tower or high platform. Can be climbed 
  for a high spot defended against enemy attack but 
  if the tower is knocked over you'll die in the fall.
  [7] Pit of snakes, scorpions, spiders, etc.
  [8] Spikes or spears against the wall. Push people 
  into them to cause death and injury.
  [9] Metal rod or lone tree in the middle of a 
  lightning storm. The first person who touches it 
  gets blasted by lightning.
  [10] Winery. Goblets can be splashed at people to 
  blind them or bottles thrown/used as weapons.
  [11] Stalactites. If struck with a ranged weapon or 
  spell will fall down straight dealing damage.
  [12] Stalagmites. Knock people down or 
  backwards onto the spikes. Going between them 
  can protect you from aerial attackers.
  [13] Clockwork gears of a great machine or clock 
  tower, dwarven workshop, etc.
  Shove or catch people's body parts into the 
  machine for them to get dragged into it and killed 
  by the grinding gears.
  [14] Grasping zombie or prisoner hands reaching 
  out from cell bars or holes in the wall. Save to 
  break free or spend a turn cutting arms away.
  [15] Ruptured slimes, oozes, jellies. No longer 
  animate creatures but their acid still burns on the 
  floor. Shove someone's face into it to burn them.
  [16] Shipwrecked. Use the rigging as a net to catch
  to catch fish or people in a giant trap.
  [17] Torture devices. Grapple people to shove 
  them into or onto the devices.
  [18] Beehive on tree branch. If knocked down the 
  bees attack the closest living thing.
  [19] Sharks in the baptismal font.
  [20] Vampire lair. Heavy black curtains block the 
  windows, pull them back to let in the light.
  [21] Chains on the wall of the dungeon. Can be 
  used as weapons or to block attacks. If the 
  manacles are snapped shut on someone's arm or 
  leg it's unlikely they'll have the key.
  [22] Beasts in cages. If released they will turn on 
  those who tormented them first, then to anyone 
  who looks weak enough for an easy meal.
  [23] Huge glowing masses on the ceiling. If 
  broken liquid light comes down and covers 
  everyone underneath, making everything but those
  splashed now dark and dim.
  [24] Giant beast's skull, open in an eternal roar. If 
  hit or pulled can snap shut on someone, dealing as 
  much damage as if the beast bit them.
  [25] Torches along the walls. Easily lifted and 
  used as weapons.
  [26] Massive pile of dust and leaves brushed into 
  the sides of the hallway. A single spark could 
  ignite it all.
  [27] Giant decorative urn; topple it on someone.
  
  [28] Poison barrels. You can dip your weapons in 
  them and attack or try to spill them on people with 
  wounds to further harm them if it seeps in.
  [29] Giant heavy gong. Cut it down and roll it at 
  people or use it to smash a wall and absorb gun 
  fire like Indiana Jones.
  [30] Dead people. Use their corpses as shields, or 
  dive among them and play dead.
  [31] Bubbles coming from the swamp. So thick 
  and viscous that they can be grabbed and thrown. 
  If lit on fire they explode, but if they hit someone's
  face they will stick on and make it hard to breath.
  [32] Snowfields. Yelling loud enough will trigger 
  and avalanche but you might get swept away too.
  [33] Huge prayer candle set. If knocked over the 
  burning hot wax comes out like a flood.
  [34] Harvest baskets. Throw them on people's 
  heads or hold them to block one arrow.
  [35] Bookshelf. Topple it on someone or stab 
  between the shelves.
  [36] Catapult. Get someone on the bucket to 
  launch them or make them stand up enough so 
  they get splattered by the arm against the 
  crossbeam!
  [37] Fight atop the branches. If you get closer to 
  the trunk you can cut off the rest of the branch to 
  make your opponent fall.
  [38] Two men fall into a giant spider's web. They 
  are still fighting to death among it. Even better if 
  they try to reach out and grab the 'trigger' strands 
  of the web closer to the other man.
  [39] Fight inside a small sized room with paper 
  walls, similar to Asian styled architecture. 
  Any attack that misses gets the weapon stuck 
  through the wall, forced to get pulled back through
  the hole it made. Slashing weapons can easily cut 
  a hole that you can just walk through.
  [40] Fight atop a log over a river. Hard to keep 
  your balance, fail and fall into the river.
  [41] Giant globe of the campaign setting. Draw an 
  enemy weapon into it, then spin the globe to knock
  it out of their hands.
  [42] Huge harem mattresses. Can be hoisted up 
  and toppled on people to distract them for a 
  moment. Flammable.
  [43] Special alchemical liquid that freezes at room 
  temperature. Break the giant holding tanks when 
  someone stands next to it with a blunt weapon; the
  waterfall that comes out freezes and eternally traps
  them in ice.
  [44] Enchanted field of flowers. Anyone who 
  tramples a flower is hit with an arrow from God.
  [45] Central bank. Giant scale becomes 
  centerpiece of a battle. Heavily armored warriors 
  are lowered to the ground, lighter armored ones 
  are hoisted up.
  [46] Magnetic ceiling. If you are disarmed or let 
  go of your weapon it goes straight up.
  [47] Minecart tracks. Push the cart hard enough to 
  barrel it into enemies that stand on the tracks.
  [48] Giant mushrooms, dusty old silk sheets, crypt 
  hangings, etc. Shake them to cause a rain of dust 
  to come down, causing everyone to spend a round 
  coughing and clearing their eyes.
  [49] Swinging axes like a pendulum. Grab hold to 
  ride it away or tempt enemies into its path.
  [50] Swallowed by a great beast. Fight in its belly.
  
SOURCE: textdata/thevault/_GM Books/World Building & Game Design/ Misc #, A/50 Area-Combat Elements.pdf