When Venom's offspring bonded with the murderer Cletus Kasady, the blood-thirsty villain known as Carnage was born. Proving too powerful and deadly for Spider-Man to take on alone, Pete was forced to team-up with Venom (don't worry, he's in the list) to barely defeat the evil symbiote. Carnage later formed a team of equally blood-lusted foes and began a killing spree across Manhattan. This violent (and infamous) event forced Spider-Man to the edge of his morals, disputing whether the red villain should be put down for good. Sentry didn't have that dilemma, though. The cosmic hero flew Carnage into orbit, and had no issue delivering a tear-in-half fatality on the mad-man.
Apparently, that was but a mere flesh wound because Carnage is back in business and will begin his killing-spree across the nation in 2012.
