He is pissed, more than ready to lecture you after this is over; he aims his gun at your running form, dark gaze locked onto you as he plans the timing in his head. “You're coming back home, Dove."

He shoots, the tranquilizer dart going into your arm and taking effect almost immediately. The scientist knows what he's doing, how much of a dosage he gave you, the symptoms, possible side effects. 

He can see you sway, and the mutant turtle approaches casually, pocketing his tranquilizer gun. “Beginning to lose balance, darling? A little dizzy, perhaps?” The dry smugness is obvious in his tone as he takes his time coming up to you.