Post edit history
Gravity as source of energy?
| Before | After | ||
|---|---|---|---|
| 1 | But why does the conveyor belt move? | 1 | But why does the conveyor belt move? :P |

| Before | After | ||
|---|---|---|---|
| 1 | But why does the conveyor belt move? | 1 | But why does the conveyor belt move? :P |