Yep... I remember when I was younger playing the original Rampage with 2 complete strangers. We were pretty far along and I put in another quarter. It got stuck.
After a few blows to the coin door with the palm of my hand, I tilted the machine... I ruined the game for two people I didn't know, PLUS I lost my quarter (it cleared the mech and fell into the coin bucket).
Some machines had an alarm, like Asteroids. You pound on that puppy, and it'd beep at you.
APf