double-jointed-monkey-crawl
the crawl (often seen in horror movies) when someone (usually a dead person) crawls freakishly usually putting their feet in front of their head in the process (thus double-jointed). If you have seen the grudge, the grudge boy does the double-jointed-monkey-crawl down the stairs.
A:"Samara double-jointed-monkey-crawled up the well!"
B:"Freaky"