I have done some testing.
I don't think you can move while Abe is in a
bottomless pit. At least with Abe alone. Abe's Y coordinates just increase (abe falls). And then the game crashes once Abe passes a specific distance (Y coord)
I can confirm that Abe is falling, because I did some memory hacking to get Abe back on the screen, and he is in his falling animation.
Sometimes you can drop yourself into a wall. If you continue to walk off-screen the X coord continues to increase indefinitely. (seems like an infinite loop)
I have found at least 5 places, so far, where drop-through-floor glitches provide an alternative way of completing the stage. Although, I have not compared it, frame by frame, to my original TAS strategy yet.
I've only tested up to Door 3 of Paramonia.
I was happy when I first saw this. Unfortunately it's just the infinite symbol... you still run out... >.<
You can actually pick up a huge amount (you still have to manually pick them up). I've tested picking up to 181 grenades...(it seems to always crash at 182?) At this point, some slight graphics glitches start to occur.
Another weird thing is that if you enter a Paramonia stage where only meat can be found,,, but you already picked up 'infinite rocks' from another stage - those infinite rocks turn into infinite meat - im not sure if this is normal.
EDIT:
Rupture Farms
http://www.youtube.com/watch?v=ycw8IfokrNo
anomalous running/skidding = glitch
Thanks to the people who found and provided info on the auto-turn glitch.