Messerschmidt devised a series of pinches he administered to his right lower rib .
Nicolai 's account of the meeting is a valuable resource , as it is the only contemporary document that details Messerschmidt 's reasoning behind the execution of his character heads .
Messerschmidt devised a series of pinches Messerschmidt administered to Messerschmidt 's right lower rib .
Nicolai 's account of the meeting is a valuable resource , as it is the only contemporary document that details Messerschmidt 's reasoning behind the execution of his character heads .