EXCLUSIVE
“Undateable” actor Rick Glassman split his tongue open during dry run and was spewing blood, less than 4 hours before the live show.
Glassman — who plays Burski on the NBC comedy — bit into a toasted bagel and accidentally chomped down on his tongue. He was rushed to the ER where he got stitches … the photos are disturbing.
We’re told Glassman has a big part in this…