Best excuse for 'research':

Harvard Scientists Build a Device to Smoke Weed During Brain Scan
Since that project was completed, Lindsey has used the same equipment to study the neurological effects of tobacco. Last Friday, Scott Lukas, the ringmaster for these studies and director of the Behavioral Psychopharmacology Research Laboratory was informed that he and Frederick will receive a grant to conduct further studies with marijuana.

Take a look at the pic - John says "You know he totally modelled that off the one he has at home..." LMAO :)