On a return trip from Greenland aboard a C-118 (rear-facing seats, Navy crew) we landed at Gander, Newfoundland. We taxied up in front of the terminal, and as the last engine was spinning down, we began standing up to grab our bags. That's when the nosewheel collapsed. The seaman who was about to open the rear door was thrown over the first row of seats into the laps of the second row. No injuries, and we all got a good laugh out of it. We got to spend the night in the Visiting Officers Quarters, which was like the Hilton compared to our barracks at Camp Tuto, Greenland, or even our barracks at Ft. Belvoir. A replacement C-118 arrived the next morning and completed our journey home.