Surfed last night, 4 guys sitting off the rocks, I had the outside, dropped into a bomb set, was about to pull into the barrell (right in front of the rocks/boils everywhere) see someone start paddling, scream YOOOOO! and pull in, he drops in anyway I get barrelled for a few seconds until his drop closes the barrel, I go through the doggie door and he keeps riding down the line.

Normally I would expect him to pull out immediately and if not, an apology once we're both back out there. Neither. What would you do?