In HS a guy joined the cross team as a senior. He claimed to have run a 4:30 mile. Well, he did, if you measure a mile as 4 laps around the goalposts on the infield of a track.
And to this day I remember running the 600 yard dash in 5th grade as part of the presidential fitness test. I remember the class was divided into groups, and the gym teacher gave out stopwatches to the students. I ran 2:00 flat and had the fastest time in the class. The next group to go had some bastard who's friend was timing. They lied about the times, and he said he ran 1:59. The teacher accepted it too. Really pissed me off. The guy was chubby and sporting a bit of a gut.
No worries, I could never get the award anyway because my sprint time was too damn slow.