Greaseboard butt wipe

From USAFA Folklore

Greaseboard butt wipe is a game played with the greaseboards located near the squadron's CQ desk. To play, mark a grid on the greaseboard with eraseable markers (or cover the entire board.) Cadets then run down the hallway and jump when they get to the board rubbing a cheek or two across the grid, trying to see who can get their ass the highest. Make sure nobody breaks his neck by smashing his head on the ceiling.