I know you can squish yourself with a barrel and get a very fast starting speed but I think I may have found a faster but harder way to instantly have a fast speed when ABHing, take a look at this video: http://www.youtube.com/watch?v=UOxc34dP7lY
If someone already discovered this then just ignore the topic, otherwise please let me know if this small trick is of any help to your future runs :D!
were you able to recreate it? It looks like a very random trick, but if it is possible to control it might be great
It takes a little practice but I was able to get it multiple times, it requires very accurate timing
To do this glitch on d2_coast_01, start your abh and then hold down A, you will get stuck in the box but keep holding down your ABH key and you will fly out of it in the direction 180 degrees to where you are pointing with your mouse. I’m assuming that this also works in Episodes 1 and 2 as well as other locations that are not coast.
Looks a lot like Exejumping (yeah, I named it after myself because im a selfish bastard like that) or Supercharging.
http://wiki.sourceruns.org/wiki/Exejumping
nice find though, too bad we’re already far away from this map, and the run is so close to finish 
Oh well, maybe the next re-run of Half Life 2 :D!
OR we might redo it, but it’s very unlikely, since we’d have to end the map with same speed, health and very close to the same pos
no