I love doing it... but hate when it happens to me. for those who haven't felt my pain/joy. playing as a tank and jetting at someone only to be grapple'd out of it. or RB dashing as an assassin... and WHAM your dead. Man I hate that. At the same time I love pulling it off. Assaults are nasty at this.
If an assault moves as I grapple them while I'm an assassin, I'll sometimes front grab them and they'll live, I wish to remedy this so I press RB to shove my sword into their body once more, or I used to till I learned all they have to do is press B and I die pretty much with no chance of survival. Especially if they upgraded to lvl 3, charges way too fast.