Here's a strat I came up with, and I've been using it in my runs for such a long time ... I had to rethink the whole approach, because using audio cues is not reliable, PLUS - allowing the janitor to move slightly right before the air-grab will introduce a few more variables into the mix ... so my solution was to basically move the strat as far left as possible, so that the janitor will always be in the same position when the bait occurs ... and lucky enough, the location where you have to wait is easy to line up (using a specific railroad tie), AND the moment when to react is also very easy to follow (based on the door behind the janitor. start to run and jump right exactly when the door shuts)