This topic really forces one to think long and hard. After some thought I've selected 3... with possibilities I've left something out. ..and the original question asked for "most memorable"...oops!
1. Best seat in house for a memorable moment... On his shoulder as Alberto Juantorena controlled the tempo in the 800m CAC Games 1981 For those too young to know the name. Google him.
2.19.32 MJ in Atl ...96 Olympics. The reaction of everyone in the stands was one of disbelief. I was working the Trials when he ran 19.66 and tht was awesome. .. but 19.32 left mouths gaping. !!
3.Bolt runs 19.93 as a 17 yr old for the WJR ... Another stunner tht left a Stadium (Bermuda) breathless !!