Ouch man. Wow. That's why I'm always scared to even try wheelies. How's your friend? Looks like he walked away without much of a scratch. But, I'm sure with all the adrenaline pumping I'm sure he wouldn't have noticed even if he was hurt. Def could have ended worse. Man, I cringed watching that. I hope your friend is alright and the bike is repairable.
Seriously though man.. considering he had no jacket, he got lucky! Fortunately he's ok