I saw the exact same thing happen "live" when I worked at MPH. One damp Saturday morning, a kid picked up his CBR600F4i, complete with brand new tires and frame sliders. I told him as he got on the bike to "be careful with the new skins". He told me "this is my SECOND set of tires - I know what I'm doing!". He didn't get 3 feet from the door, and his bike was spinning on its side in the parking lot. His buddy that dropped him off was laughing so hard he couldn't even help him pick the bike up. I didn't say a word....just walked back into the shop, sat down at my desk and laughed like a mental patient for about an hour.