Strange behavior

I have just been handling my 2 year old corn snake, he was completely fine to get out of the Viv and usually is. He's very well handled and even if I don't handle him for a few days he is always pretty calm. However after holding him for a couple of minutes he started racing about really quickly then started throwing his head about in circles, he wouldn't stop it and every time I moved he would do it again. This went on for a couple of minutes until I had to put him away, he wasn't trying to bite me but this has really worried me because he's usually quite calm.