About a ten acre bare ice patch on the river. That was a good time. 36” thick ice and a datsun b210. We were out of control for hours. My buddy’s dad built a snowmobile oval race track on the ice,that winter i had a 69 corolla. That was fun too. Driving to/from the track would only go at idle, with me pushing. Climb in and it would break through the hard crust and spin out. Once i made it to hard pack it was good to drive.