It’s mostly people from particular countries that continue to blow my mind with their rude behavior (China). Like in your face rude. Old ladies pushing against you, like you’re going to move aside, you hold your ground and they push harder until you call them out in front of the Mona Lisa and yell at them. It’s not just a crowd, it’s rude cultures. British people behave politely, apologize if they get close to bumping you.