How can i get my 2 year old son to behave in a store or in general?

see what my sons does is sometimes he grabs the stuff on the store shelf and he throws it and when there stuff in the cart hell grab them n toss them out the cart.When he walks around the store and he dont get his way he'll cry or run around the store and when i grab his hand hell sometimes drop himself on the floor and he makes a crazy seen. we tried timeout n hell jus laugh or get mad throw stuff at us....it's jus crazy cuz i dont know why he acts like that.

You need to set boundaries and you need to be consistent with your discipline. Your son needs to know that you are serious and that you won't tolerate bad behavior. When you're shopping and he starts throwing things, tell him you want him to stop and explain why you won't tolerate that kind of behavior. If he does it a second time, explain to him that you will leave the store if he doesn't stop. If he does it a third time, leave the store. You can do the same three chances when he misbehaves at home, but use a time out as a consequence. (If he enjoys time outs in his room, you can make him sit in a corner.)