A: There's a pretty obvious sound, along with a text prompt, and even an audio prompt if they res with the others dead. If you're missing the cues for a red, you're horribly in observant. B: The player is not immune during the start animation, meaning one shot from an Icebreaker, or an easy shotgun + shotgun or shotgun + melee combo will get you an easy victory. Not to mention a Fist of Havoc or a Nova Bomb.