It is possible to go out of bounds at the start of the Skittergate level.
Step 1: Jump up on the broken wall
Step 2: jump from that wall to the small piece of broken wall
Step 3: Firewalk to this location (reticule must be at this location.)
If done correctly the firewalk will make you go through the window so you can reach the location seen in the first image.
works every time if done correctly