Bug: Exploit of Groldy behaviour which allows flinging towards them

[wisprabbit]

While trying to reproduce a separate bug in a Groldy level, I found a sequence of moves that allows flinging towards Groldies who are throwing blocks:

1. Step in and out of a Groldy's line of sight so that it throws a block
2. Step once parallel to the line of sight
3. Step back into the line of sight. Instead of throwing a block, the Groldy moves to a diagonal position opposite to where you were in step 2
4. Fling towards the Groldy into the block it's supposed to throw. The Groldy cannot get back in time to throw the block

I recorded a video on Blackhold which shows the sequence, and also demonstrates that the exploit can be used on Blackhold to skip the block puzzle:
https://www.youtube.com/watch?v=tMBgcdcASDI