my monitor lizard

Question
hello.. I have a 3 yr old bosc monitor who is healthy and friendy.. last night he went limp eyes rooled back, and basically died!!! i flipped him over and massaged his heart and he came back round in about half an hour??? he seems ok today but have you any idea at all what happend to him ... im so glad i was there at the right time !!!xxx

Answer
 I would have him seen by a good reptile veterinarian.  He sounds like he needs a total check up to see what the cause was.  He may have had a seizure, a foreign body obstruction that you may have dislodged by flipping him over, or many other reasons for this, and you sure wouldn't want it to happen again.