What?? Can you say that again? One more time. I'm still not getting it. I don't understand. Range from hiccup to full conversation nosedive and subject change depending on how worth it to you it is to waste your time talking to an asset.
Or
Just interrupt them or make them forget their lines.
Tell them how important it is not to forget their lines, tell someone on your phone. Tripping them up is also really fun.
Change the subject to be about them.