Look at the way that noggin opens up at the top! Fantastic.
2K was sent to sort out a bunch of Daleks and Mechanoids in Impasse. Obviously he gets into a right old pickle, what with a planet on a collision course and all that, but I wouldn’t feel too bad about adding to his problems with a swift jab to the arm.
Presuming that doesn’t pop open with spikey bits as well. I’d need a sticky plaster then. Messy.