Tony doesn't mind and Bruce can take however long he needs with Mohinder so long as he keeps the monitor on at all times and doesn't go too close. They don't need a repeat of the roof incident. Or with what happened with the agents. Bruce can't die, but there's a lot of others that might as the result and Tony really doesn't need that.

Bruce and his guilt-- it's more of a show stopped than the Hulk.

"I'm sure he's fine. We've all played around with recreational drugs here and there." He pulls on a shirt and pads out of the room. He'll let Bruce follow when he will.