After breaking like a 50 yard run on 4th and long. A couple plays later they had to burn a timeout because he was puking. He ended up throwing a TD on the last play of the game to win it though, so the puking there was largely forgotten.

Hard to know what it was...McNabb in college was insanely athletic and ran all the time, scrambled and extended plays all the time, ran the option often, etc. Would be hard to believe it was conditioning if he did it as a 22 year old who could seemingly run all day.