Actor Justin Long is on the mend after undergoing hernia surgery last week (ends14Sep14).

The Live Free or Die Hard star was a guest on U.S. Tv personality Andy Cohen's late night show Watch What Happens Live on Monday night (15Sep14), and just before the programme started, the excited host jumped into Long's arms to greet him, straddling him with his legs.

However, Cohen had no idea Long was recovering from the procedure, and the actor recalled the harrowing moment on live Tv and said, "It's a move I'm very familiar with, because I am a monkey, like Andy is, and I do that to people all the time.

"But what Andy didn't know is that a couple (of) seconds before he did that, I was going through my head, 'I wonder if I should tell Andy that I had hernia surgery four days ago', which I did. I had laparoscopic hernia surgery."

Cohen later posted a photo on his Instagram account of himself in his guest's arms, and Long later replied to him on Twitter and wrote, "What the audience can't see is the 5 day-old surgically implanted hernia patch, now struggling, to hold my intestines in!"