#1203: Time Machines explain

[Small caption above the first panel:]

The problem with time machines:

[Cueball has his hands on the lever of a time machine.]

[Cueball flips the switch from OFF to ON.]

Switch: Click

Time machine: EEEEEEEEEE

Switch: Click

[Cueball flips the switch from ON to OFF.]

[Cueball looks at his palms.]

Cueball: ???