banana, sheep, minigun: BOBJOB
take banana, etc, off: BOJBOB
Choose the mini-gun after putting in the BOBJOB cheat. As you press the space bar to shoot also press F1 or F2. If pressed at the right time your mini-gun should shoot about 20 Bazooka bullets.
Aim at target with space. Choose Bazooka. Hold down F3, F6 then spacebar. The effect will be like an Atomic Bomb.
Thanks to Revolution readers Matthew Taylor, Andre, and Luiz Fernando Mendonca!