Hey
Call you unit 'dude'
then, in a trigger, type the following:
flare1="flare" camcreate[getpos dude select 0, getpos dude select 1,50]
That will create a flare up in the sky. NOw, if you want a bomb, replace "flare" with one of the following:
heat73
heat105
heat125
shell125
shell120
O Neil
PS: What else can you put there ?