I mean, in real life i really wouldn't get myself in front of someone with a knife, but scrething a leg for him to trip is something that i definetly can see people doing
Take a screenshot of the bloody mess of the Assassin send it to the bad guys "This is what i did to the last guy, keep f**king with me and my friends I can dO MUCH WORSE" a threat like that would make any villain p*ss his pants..and forever take the stairs.