The word "hoon" gets thrown around a lot here. It is usually applied to auto-, moto- or aero-based shenanigans. What about the lowly boat? What are your schoonigan (eugh, I feel 13 just typing that) stories?
I'll start. One bright, warm Sunday, when I was a young Kake, my well-to-do friend invited me kayaking. I acquiesced and soon we were out in the bay (not a terribly roomy bay, mind you) paddling the school canoe... or kayak. However, because we live in a fairly busy port city, the bay was also full of container ships. We were almost struck by one. The End.