You shouldn't act oddly around others.
Seth was in the grocery store looking at some products on the shelf.
Seth wants to pick up a can of corn.
Seth picks up a can of corn and puts it into the cart.
Seth picks up cans of corn from the shelves and starts to make a tower with them.
The manager of the store offers to ring up Seth himself.
The manager of the store sees Seth and asks him to leave the store.