Fisher-Price Shake 'N Go Doc Hudson Doc Hudson, a '51 Hudson Hornet, is the town doctor and judge He also has a personal dislike of racecars, so when Lightning McQueen tears up the town, Doc shows no mercy Just shake him up to start his engine, let him go and watch him race The more you shake him up the longer he goes up to 20' Piston Cup Edition makes this Doc Hudson even more special