What American business niche did you consider bringing to Britain?

I was on my BIL's stag do 20 years ago and we went to an axe throwing place. Was not my turn, so standing in the "safe zone" chatting to my dad. An axe bounces off the board and back in our direction, goes flying past us, right over my dad's head, so close he could feel his hair move (either from the axe itself or from it creating a breeze as it flew through the air). Everyone is just staring open-mouthed - except my dad, who was oblivious until we told him. "That was an axe flying through your hair dad"... "oh I did feel my hair move actually". I mean it must be relatively safe otherwise they wouldn't be popping up all over the place, but funnily enough I haven't been up for it since then.