I have no knowledge or expertise in this area, but this squirrel’s behavior does not sound normal. If it isn’t rabies causing the bizarre behavior of “jumping on people” and biting them, then maybe it’s on bath salts or sumpin’. I am assuming the victims were not attempting to corner the thing.
From 1997....
Kentucky Doctors Warn Against a Regional Dish: Squirrels’ Brains
“this squirrel’s behavior does not sound normal”
Being stuck in a human structure is not a normal situation for a squirrel, so you shouldn’t expect normal behavior. A wild animal in that situation is going to be very scared and defensive, and squirrels are naturally very jumpy and high strung anyway, so if you get them scared in a strange place, they go (pardon the pun) a bit nuts.