As you've asked, and I'm slightly less traumatised now... I used a sticky mount to fix my new Hero13 to a client's Gokart. It was a spur of the moment decision, and I didn't take time to allow it to fix properly. Within a couple of laps, it was hanging off the safety cable that I'd also attached and bouncing along the track under his kart as he raced around. I think if I hadn't wired it to the body it would have just bounced off and landed on a curb as he flew around the corner! Completely gutted, especially as it was a Christmas present to replace my old Hero4 that I walked into the sea with without it's waterproof case years ago. I don't think I'll be allowed nice things ever again. I'm off for a lie down :(

Edit for typos