Which bad decision has hurt you the most?

I think it was definitely Morales vs Diaz for me, i mean Erik comes from 4 losses, is completely shot, appears to be in trouble in the first round and then knocks diaz down with a great right hand, wins the first 6 rounds clearly, then wins 2 of the final 6..still fighting even though its pretty apparent his legs are gone...survives some clean shots from the bigger man... after more than fifty fights in which he has given us so many great fights, capturing 3 world titles in 3 different weight classes, this fight will get him the 4th in as many weight classes making history for mexican boxing, in his last fight and this is how they pay him????.... ive never felt worse fo a baddecision in my life as aboxing fan...