Omg!!! Squirrel encounter!

Context: I sat my breakfast down to take a picture of some baby squirrels and all of a sudden a UMBC worker said "watch out your food and drink!"

I look down and see this fella attacking my food! It was so close to me as seen in the video.

Is this normal squirrel behavior!? It was so cute!!! Even when I picked up my food and drink it stuck around for a few moments then went to chase another squirrel