Go into Experiment mode and pause game play. Take off the AI mode and unlock Autospawn if it is on. Press [Keypad 8] to take out a bat and press [Space]. When the enemy is falling, hit him with the bat from downwards to upwards. He should go up in the air and come back down sideways. Keep hitting him up in the air and he should go off the screen. Every time you hit him, he will go higher.