Considering the state of GSP`s face in there first bout i fail to see how you could NOT expect Penn to be a live underdog. If you compared there faces from the first bout you would positively think Penn won as he had minimal facial damage whereas GSP`s was a mess. GSP learnt alot from their first bout and takes his training seriously. Penn lives the high life and merely lives off his god given talent.
Yup, he would throw that punch and follow it with a right roundhouse. Honestly, that punch was like the coolest thing I'd seen. Not a fight finisher, but it looks good and it is very sneaky and effective if you follow it up like he was.