Ok... The kid is scared crapless of werewolves, but has a dragon as a pet, gets shot at by hundreds of randoms, and falls over 50000 ft, and doesn't even blink an eyelid...?
I think that the combos should only be reset when you stop shooting because I had several occasions when i had to wait for them to blow up to get more.
How typically human. Oh noes, we invaded someones territory and they retaliated, now we have to go kill them and destroy their whole race....... *sigh*