title: Unity - Activating "is Trigger" makes stuff fall through objects
body: <p>I am following this tutorial: <a href="https://www.mvcode.com/lessons/roll-a-ball-obstacle-course" rel="nofollow noreferrer">https://www.mvcode.com/lessons/roll-a-ball-obstacle-course</a></p>
  
  <p>At the very end we created enemies (cubes) and their movement works very good. But as soon as I activate "is Trigger" they fall through the plane into the void. What am I missing? </p>
  
  <p>I tried to pull them above the floor to have some space between the bottom and the enemies, but they keep falling through the floor and only when I got "is Trigger" enabled.</p>
  
  <p>thanks in advance,
  Akuma</p>