My successful electrical weekend project ended with a 3-way from hell! Help
Back stabing = fire waiting to happen or paying someone like me to fix it!

1 screw 1 wire same reason!
Must pigtail the wires properly with proper means 
Loose connections burn down building!

3way switch line goes to dark screw of one switch, load goes to dark screw of other switch. The other 2wires between the two switches go to the 2 light colored screws,  either or, doesn't matter

If you remove a 3way switch, and tie the 3 wires together the load will be energized

No breakers tripped, still no power, device or wire burnt in half