MINI Chinese Job: World Record for Tightest Parallel Parking [Video]
The driver manhandled a MINI Cooper Chinese Job Special edition into a space (between two other MINIs, of course) that was just 15 cm (5.91 inches) longer than the car. Thus, the previous record was beaten by quite a margin - this stood at 22 cm (8.66 inches) and was set by Patrick Folco.
Now back to the idea from the introduction of the article: maybe they could slide the car in a space that smaller than it in such a way that just the bumpers and nothing else would come off... Anyway, until that happens, you can check out the stunt in the clip above - do try this at home, but use cones!