...OK, the joke was dumb, and the patient has a mouth-control problem. The proper professional response would have been to get the blood draw over with as quickly as possible and move on. What the student did was retaliation that calls into serious question his/her/its ability to act professionally in any tense situation. Woke Forest accepted a lame, you-can't-prove-otherwise, excuse and defended the indefensible. Unsurprisingly.
In any other time in history, a medical ethics review board would be looking into this with a microscope, and almost certainly credentials would start disappearing - starting with the medical student who just confessed to ASSAULTING a patient. Almost certainly the doctor who was supervising her would have his MD at least suspended for allowing the circumstances which built to this incident in the first place as well.
Apparently not in the Bizzarro World which presently obtains, however...