Dropping the O-bomb

Conversation with Dave earlier tonight:

Dave: I think I'll run 10 km tomorrow

Me: Isn't that like 10 times around the park?

Dave: More like five, but whatever. Maybe I'll start with 2.5 and see what happens.

Me: OK, but don't forget that we tee-off at 12:12 and I don't want to leave only at 12:00 'cause you're running.

Dave: Ben non! Of course not!

Me: Yeah but we're often late because of you!

Dave: WHAT!?!?!? Did you just say "often"!?!?!? (like it's a lie or something)

Me: Yeah. that's right, I dropped the O-bomb.

I win.