He hesitates for a second before running back upstairs and grabbing the back of Baku's shirt collar with his teeth, throwing him up unceremoniously onto his back and then sprinting off, forcing Baku to hold on tight
He falls with a thump, hurting his back and ass a bit, and Lukas just quickly picks him up again, reaching an alley way and coming to a stop, staring down it, hackles raised, growling.