Yes, that's a house sized T-Rex, on a New York subway car, looking at a poster of the T-Rex Space Force.
The mini-comic will be available for sale whenever I do a show or convention, so this comic in its entirety will only be available until Tuesday (12/3/13). Until then, enjoy!
"Dopeasaurus Rex" is © Jamel Jones, 2013
(Update on 12/3/13: I took down pages 3-6. I'll have the mini-comic up again another time!)