make things bombs destroy flash

This isn't quite right. I either need to compute a timer so they flash as
long as the explosion or I need to make the explosions a fixed time or
something.
make flashing crates flash a little longer

unfortunately because the flames run an indeterminate amount
of time they somtimes last too long.

The fix would be to tie their lifetime the flame itself
tie exploding crates to their flames
make it so you drop bombs only under you