I guess that he was greasing a landing gear and stood up too fast. Which resulted in a pretty decent gash to his head. A gash that required 4 stitches.
After getting stitched up, he went back to work and completed his shift. Such a trooper, huh?
When he got home tonight, he showed me the accident report that he had to fill out.
"No damage to aircraft, just personnel"
HAHAHAHAHAHAHAHA ::breathe, breathe:: HAHAHAHAHAHAHAHAHA!!!!