I almost think my boost was from my jumping right when I landed. I believe it’s from hitting the frame of the portal. The game might Think its a slanted surface and give me the extra boost from that. Similar to if you straife jump, then jump when you land on the stairs in 02. (Will upload a demo of me doing it in a bit so you can see what I mean)
To explain further I think its because the portal is slightly off the ground. and because of its being off the ground, and the ground being just below the portal, when i land the game goes “because of the different heights it must be a slant” and it forces me to get that extra boost of movement.
Heres a demo doing the style of boost i was talking about. its done just after the door opens before i go through the blue portal.
the other possibility is that i got a tick perfect jump and that gave me the increase of speed. i find that hard to believe though. I honestly suck at abh-ing. when im not going for a pb i use a macro. (an external program. i find y_spt_autojump 1 is just too fucking cheap)
ive been doing some thinking about what pcow said about it being the movement between portals. and that makes sense. Could it have any relation between when you crouch going through the portal? if so it could be a mini-LAG but on a vertical surface. The game doesnt know what your position should be when you go through the portal. and because of how portals are handled, the game breaks and gives you a massive boost.
sounds like lag to me, but lag warps you elsewhere.
oh, and one last thing. I also get random portal boosts on testchamber 4. (i think thats map 3). when i do oob strats i do a couple consecutive really fast portal peeks. and its actually rare for the game to not boost me out of the map at least once. When i stream tonight ill get a demo of that.