well regurgitation in itself isn't so dangerous, it's the reasons behind regurgitation that can be nasty. Usually the only reasons for a regurge are because a. the prey item was too big. b. you handled too soon after the snake ate (should wait 24-48 hrs before handling after feeding) c. the temps are too hot d. the temps are too cold and e. the snake is very ill. If it is a one time thing it may not be too concerning but any more than once it's vet time. I think all this is right but the pro's will answer as well. hope this helped!