I gotta say… the bunch of you whining about this fake are infinitely more annoying than it ever could be by being fake.
OP didn’t wash their mouth out at any point before the hospital? Red flag and mouth right there.
A dagger does d4 damage. A dagger is not a small knife, it’s like 8 inches of blade. Compared to that, a human bite should be like a d2 on the high side.
The stronger muscles of a human body is the one of their jaw. A bite can do serious damage. And when you dagger will cut or stab, your bite will ripe away skin and flesh.
That happened.
I could see this as being fake, but I believe it is equally likely to be real. 11th hour, slightly buzzed or worse, character is hanging by a thread and you want to stretch every rule to infinity and beyond? I have seen some ahem interesting…examples to “validate” a rules “extension”. Chainmail belts, blowdarts, contained arson, to name the standouts. Just biting someone hard enough to need stitches? Easily possible.
“I hurt my friend because I took a dumb idea too far” is a very probable story. The part I can’t believe though is ending the game over a dire bite. We finally got the schedule together, we’re going to use the time, darn it!