can he even do 25 strict pull ups in a row (not letting go of the bar) 
THAT was my exact question?
How many did he do in a row with his hands on the bar and no rest?
The most I ever did was 24 strict from the dead hang each rep, with minimal body swing.
I weighed around 185 lbs and this was at the end of bootcamp.
The best I could now is around 12-13 at a chunky 255 lbs.