Apparently, you are clueless.
For anyone who doesn't have the game on tape, you can find it at the 1:56 mark of this video --
http://www.youtube.com/watch?v=FQZQ4mQ268o
Sapp embarrasses Allen on the next play of that highlight video, too. (It's not the next play of the game. It actually came before the sack.)
After watching Sapp's sack in that video, everyone can decide for themselves whether --
a) Sapp lined up across from Allen, and Allen was the only lineman who attempted to block Sapp. Gurode was looking to his right, away from Sapp. Allen got embarrassed on the play, but we lucked out when Sapp was flagged for roughing the passer (leaving his feet and landing on top of Bledsoe). ... Allen started to block Sapp but was pushed backward. Allen lost his footing in the dirt (the baseball infield), nearly did the splits, quit blocking Sapp, then put his hands on the ground as Sapp grabbed Bledsoe, picked him up and bodyslammed him to the ground.
OR
b) Sapp was not lined up across from LA. ... LA NEVER attempts to block Sapp. ... He never "blocks" him, it isnt even his assingment. ... The way Allen starts the play, it doesnt look like he anticipated Sapp coming free.