[Robin and Marshall are at a shooting range]
Robin: [after firing] Yeah, that's the stuff.
Marshall: Oh my God! How long have you been doing this?
Robin: My Dad taught me to shoot when I was a kid. Now, whenever I'm feeling lonely or depressed, I come here and it reminds me that... guns are fun!
Marshall: Um, you know, Ted is kinda against guns.
Robin: That's why Ted never gonna find out about this. Whoa! That sort of got scary with me holding a gun, didn't it? No, I just mean, please don't tell Ted.