@VegasJen - thank you for the thread. Totally agree this needs reminding.

Fully kitted tri - in the Olympics = drafting permitted. Maybe so pro, he thought a full bike length was not drafting? Maybe just pumped from watching his sport on the airwaves.

Totally thoughtless. But if you looked pro as well (rear disc, deep carbon rims?) - then maybe not creepy. But 1.5 mi is a long pull.

The appropriate arm signal is an elbow flick. If no response. Followed by left arm out and hand pointing to ground (slow). Followed by gently dropping/tossing a water bottle at his front wheel. Triathletes need occasional bike handling skills, as also proven at Olympics.