In many websites (especially in Spanish), it is mentioned that the worst performance in Men's 100m is that of Kim Collins, 21.73 seconds at Athens World Championship in 1997. To make things more spectacular (and, to me, more suspicious), this is the same Kim Collins who became World Champion in the same competition five years later.
For me, it's hard to believe that that the record was for a real, normal run. It's also totally inconsistent with the progression timeline of that runner (it would seem credible if it were a 200m run). Does anyone know what really happened?