Donnie has an aptitude for recklessness, reveling in thrilling, dangerous activities such as when he tests the Turtle Tank’s taxi rocket and enjoys the experience despite having no control of the vehicle and traveling hundreds of feet into the air in “Late Fee”. He also has a violent streak as Donnie regularly attempts to physically attack others with little hesitance and can be wild, typically acting more like a deranged scientist than a heedful man of knowledge.