In an update to reports that Vince McMahon flipped out backstage over the blood during Sunday's Brock Lesnar vs. The Undertaker match at WWE Hell In a Cell, apparently it was not the blood that he was upset over.
Although he wasn't pleased to see blood, Vince was more upset over the fact the Doctor he sent to the ring to clean up some of the blood was pushed away by Lesnar. It was something that was not planned and 100% shoot.
The belief is given WWE's strict rules regarding "blade jobs" Lesnar did not purposely cut himself and the fact that he needed 9 staples would suggest he was busted open the hard-way.
There was reportedly no backstage heat on either Lesnar or Undertaker for the blood.