[Perhaps unfortunately for them both, Merlin is used to dealing with stubborn, rude assholes who refuse any sort of help just on principle. In fact, it's almost nostalgic for him.

He grins, shrugging nonchalantly.] I'm used to keeping up with people much faster than me. I'm more stubborn than I look, and I'm not afraid to admit I need back-up out there, so you're not getting rid of me so easily.