Several years ago I was doing a crit when the organizer (a shop owner) decided to use one of the electric bikes he'd just gotten in as the front marker for 3 neutral laps. Basically he was going to ride at the front of the group as we paraded around for 3 laps and then when he pulled off the race was on.

Thing was he forgot to charge the batteries.

Once we realized this we got right on his rear wheel and kept slapping his back tire and yelling for him to go faster which he would do until we had pushed the pace up to almost 40. He absolutely destroyed himself pedaling that thing around the course.

Good fun.