Temple Assembly Site early PBX
Discovered by: XtraX
Description and video by: Flamancipator
This is the early power bomb expansion that can be acquired as soon as you've got Space Jump. Using the Secret World in Temple Assembly Site, you can wallcrawl to obtain the expansion from the next room in Secret World state, as shown in this video: http://www.genericgamer.com/MP2/Wiki/earlypowerbomb.avi
This is currently being considered for different speed usage capabilities and possibly a no-Gravity Boost game. For low% purposes, it does nothing since the Ing Cache in Dark Oasis (I believe it's called) will not appear until you pick up the main Power Bomb upgrade from Power Bomb Guardian.
The video has been edited to include an exit method. It's quite unique and takes probably a few dozen seconds less than the door warping method. Overall this trick takes 2 minutes or so, and I definitely believe this is viable in a speed run using alternate routes.
Note: Another exit method (discovered by: XtraX) was used by DJGrenola in his latest low% speedrun (segment 7). 17% @ Archive.org (outside link)