10 Kill streak you get rabbits who go around biting peoples heads off

15 Kill streak you get a horse and you go around with a sword and chop their heads off

20 Kill Streak you get the smoke monster of lost which flings you up in the air and you drop to your death

25 kill streak Old Age Pensioners go around hitting you with their walking stick but... they all connect together to make a giant robot and start squashing people with the bottom of their walking stick muhahahaha.
30 kill streak Fat people jump of a helicopter and bounce of the ground and causes an explosion like the fat person off worms!
50 kill streak Get a button which plays 8 year old kids screaming for 1 minute which causes the gamers head to explode then you can go to their spawn and make love to them