I remember watching a guy play an arcade game back in about 1990, I think it was spy hunter or something but the car could do a jump and side scrolled to the right. Not sure. Anyways, over the course of about 4 hours this guy plunked about $100 worth of quarters into the machine until he beat it.

10-year-old me was, uh, impressed to say the least. I tried playing it but I only had two quarters and lasted less than 3 minutes.