Climbing the wall

Climb up as fast as you can and ring the bell. Garth was in the running for a medal. Surprisingly quickly he found his way up. When the umpires hear the bell, time stops, and given the times of the other contestants, Garth may well make it onto the podium! Garth climbed the last few inches, stretched, and tapped the bell firmly. The bell flew off the holder and landed on the ground with a thud. Without ringing audibly, according to the umpires on duty...