Here it is, Optimus Rides the Subway by Jetpacks and Rollerskates (myself). Some people may say ludicrous! I say robots get sore feet too! pick your side.
If you wanna check out more of my work be sure to check out jetpacks and rollerskates my blog and illustration site. Follow me on twitter (@blakestevenson) to get a play by play of sketches and more. Also check out awesome Deviant Art page that is constantly being updated.