Press 0 + L for huge explosion in front of you (you will be godmoded for the time of the explosion)
Press 0 + K for huge explosion right by you and around you (Inferno-Mode), to blow up surrounders. (You and your car/plane will be godmoded)
Press 0 + J for huge explosion far away (you will be godmoded)
Changelog:
v1: first release
v2: added Inferno-mode
v3: Now you have to press 0 + letter, this why
there won't be explosions while typing cheats