I'm such a speed demon ;)

Clif (backseat driving): You don't have to be reckless and go thirty[mph].

So this probably needs some explanation. The speed limit here is 25 mph and most of the time there's some slowpoke who thinks that 25 is waaaay too fast so they go 15. And there are almost no areas where passing is allowed so you're just stuck. Apparently Clif's a little too used to it.