I don't consider losing a 3-1 lead in a seven game series against an equal opponent to necessarily be a choke. That just happens in sports.Maryland blowing a 20-point lead and losing in 2001 ncaa basketball semifinals to Duke.
The ten-billion times Terrapins have been favored in ncaa lacrosse title game, but came up short.
Sorry Zappa, but '79 Orioles going back to Baltimore up three games to one...
TBH I think we throw the "choke" word around far too loosely.