Blasting past stationary kayaks close enough to high five the occupants is just flat dangerous, regardless of whether they knew it was coming or not. Accidents can and do happen, usually when people are doing something stupid. I'm glad everyone involved had a chuckle, and it turned out as well as it did.
You guys jump on him so fast with out knowing anything, ridiculous. My first thought was he knew all of them.
Looks like fun!