In this particular situation though, it just felt to me like Park was belaboring the issue. Things like being agitated over an extended period after a kerfuffle, or survivor's guilt and the like aren't things I relate to very well. Is it because I've never been attacked or seen someone being with a knife and don't know what it's like? Maybe, but it's also because I'm not one to remain distraught over traumatic events.
Well, I am, so it made sense to me.
Taub was the one who was tackled. I didn't see who did the tackling, but I assume it's someone House paid to do it.
Remember when Taub was talking to the janitor while House was hiding with the super-soaker? House wondered to himself why he hadn't thought of using the janitor as an agent.
So he did!
Maybe I'm confusing two different scenes, but I thought the tackle happened at the tail end of the same scene with the janitor. But if you're right, House saying "Why didn't I think of using the janitor?" could've been just his usual mind games -- "Oh, that's right, I already did!"
It was two different scenes. House used the idea Taub unintentionally gave him earlier in the episode.