Quote Originally Posted by pavlaugh View Post
Thanks for the comment about bounce vs. stifle. But are you sure about the triggered ability? My understanding (and I think others') is that stifle counters the delayed trigger when cast in response to the @ end of turn trigger going on the stack.
This.

For clarify, Sneak Attack's activated ability creates a delayed triggered ability to sacrifice the creature at the end of the turn. If you counter that trigger, the creature will stick around and it will never trigger again for that creature.