Trigger
Countdown: 20 20 20
Condition: true
On Activation: LGB1 = "laserguidedbomb" camCreate getPos Glogic1; LGB2 = "laserguidedbomb" camCreate getPos Glogic1;
Syntax not guaranteed. Check the ammo listing for the type of bomb you want.
However, using timings for things in an Intro is not always the best way, different computers run at different speeds and you can get small differences. So for some people the explosion may be "early" or "late" in the scene. Probably better to trigger it by some other means.