baby tantrums???

Anyone experiencing or experienced baby tantrums with their soon to be 11 month olds???
My baby has been throwing a fit more and more these days.. he'll start crying and throw himself back.. luckily most of the time he does it it's on the bed.. I'm terrified of him hurting himself if he does it on the floor. He literally will get upset if I don't give him food fast enough and start crying loudly and toss himself back. Idk why he started doing this and how to fix it?? Any tips or advice would help. He just randomly starts bursting out crying and throwing a fit and sometimes is hard to console..