The hardest shots landed in a fight, that didn't knock the other fighter down?

Two punches in Pac-Marquez caught my eye, the left hook that shook Pac, he was off balance AND the shot was really hard and accurate, shocking he didn't go down and then the left hand on Marquez, he wasn't even looking at the punch and he walked straight onto it, he was rocked bad but didn't go down. The overhand right Maidana landed on Khan was a big shot too and Amir was off balance when it landed. The uppercut Ruelas landed on Gatti was one of the most horrible looking punches iv ever seen, you could see the tendons in Gattis neck stretch and the look on his face said it hurt, but he didn't budge ... I'm sure there's many more, name a few? maybe post some videos