Back in December, I suggested a Weekly Challenge idea based on a find by Rogotin (see http://www.robotentertainment.com/forum/topic/Am-I-missing-something#comment-102109 for instance) : beat The Edge, using only level 1 barricades (no weapon, no trinket, no other trap).

This was my "Proof of Concept" 5-skulling run.

The idea didn't make it into an official challenge, but it's kinda lived on as an unofficial challenge. Juicebags for instance has just posted his own take on it (link on my Twitter).