Eric André ended up hospitalised with a concussion after injuring himself on the set of his TV show. The 41-year-old comedian writes and stars in ‘The Eric André Show’ for Adult Swim but revealed that accidents are “pretty common” during production of the sketch comedy series and during an episode that guest-starred John Cena, he ended up being knocked in the head by a metal frame. He told People: “It’s pretty common. I got through the shelf okay, but we forgot to sandbag the shelf — the frame of the shelf — so the metal frame tipped over and knocked me in the head. I got a concussion and went…