PETA was mad at Dodge for running an ad that had a chimpanzee in it, considering the history of abuse monkeys have suffered in the entertainment industry. Not that any happened to this monkey, just to monkeys before it. In any event, in the revised version Dodge complied and digitally erased the monkey in the track suit.... but now there's just a disembodied suit walking over and pressing the dynamite lever. Dexter's Michael C. Hall monotones in the voiceover, "Oh wait, there's an invisible monkey." Hilarity!
The first one was just meh, monkey joke. The revision is an act of surreal genius, and a giant finger to PETA pantywringers.
(Not a very good ad IMO, but an entertaining one)