My 2 year old wont stop throwing. Please help!

My son is 27 months old and for the past several months, in the middle of his meal, he will stand up in his high chair (with our supervision of course) and throw his utensils and bib across the dining room. He will not sit back down.

We always make him pick up what he throws and he will. How do I get him to stop doing this?

Btw, it’s not so much the standing, it’s the throwing. He will throw even when he is strapped in. Please help. Thanks!