i went curling on a frozen lake 1 day, in a small truck camper,we cut a 3 foot hole in the floor to ice fish threw,the wind came up and when my 2 buddies got out to get beer and piss (combined weight of about 400 pounds) iwas left to the mercy of god,the camper started to slide, before i knew it , i was gaining crazy speed, i figure at least 40 mph, camper was shakin like a bitch and snow and ice was being ripped up into the inside of the camper and i thought i was gonna eventually slam in to the concete dam, next thing i see is my buddies roarin by and going in front of the camper and slowing it all down, Most fun i,ve ever had, terrifying at the time .