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.