I haven't been able to test out whether or not this is repeatable or not, but was wondering if any of you had run in to any weird jump boosts like this before. Maybe this is the only spot. I'll try to find out more when I have a day off. It may save a couple seconds, so not the biggest deal, but if it can be something used elsewhere it could lead to some interesting things.
Interesting. Usually similiar effect happens when you fall when you barely hit the edge of a platform (giving this little speed boost) but somehow you managed to do it while jumping. I presume game thought you were falling near the edge, while you managed to jump at the same time you hit the platform, thus giving upwards/forward boost. If this is repeatable/consistency, there might be few places where it's handy and saving some time.
Alright, so I tried to do it for like an hour, and couldn't replicate, so presume it's (near) frame perfect trick. Though if you manage (by some miracle or muscle memory) to pull it out couple of times in run, it should save good amount of time the more you are able to do, that is if you are able to. Otherwise: ¯_(ツ)_/¯