Well, it might be tech that some players already know and I just haven't observed yet. But basically by studying the frame data and matching it to the gameplay footage made available, then asking for the blessing of Barney Spirit and using my imagination to come up with what should be frame traps, vortexes and the like.
...I've been sitting here thinking for a minute as to what I could possibly say to that, but I've got nothing apart from this brief explanation of said stupor.