when youre in a sub youre pretty much stuck in that position n defenseless the guy can snap your arm/leg n potentially end your career, so tapping to arm/leg locks is k chokes might not do as much of a damage on the body, but the feeling of not being able to breathe n choking is one of the worse in the world, so tapping to chokes is also k the ref will only step in after youre either have a broke limb or are out. when it comes to strikes the ref will step in before youre out. in other words all you gotta do is cover up n not defend "intelligently". the ref will not wait for a fighter to be completely out to step in. also tapping to strikes means the fighter wasnt able to tolerate a bit more of pain, which raises questions about his toughness. like when rory got his nose busted. he fell cause that probably hurt him, but he didnt start tapping. he let the ref step in. same with chael. as much of a quitter he is, he never taps to strikes. he just curls into fetal position n lets ref step in.