fire se 2,0 -1,3
| tower falls
| span -2,2 falls, because its other head is damaged
-| BUG: doesn't fall now, falls on its next write
fire se 2,0 -3,1
| trigger a bulletin as a separator
fire se 2,0 8,2
| head damaged
| span -1,-1 falls, because its only support is gone
| span 0,2 falls, because its other head is damaged
-| BUG: doesn't fall
fire se 2,0 1,1
| trigger a bulletin as a separator
fire se 2,0 8,2