If you�re not familiar with the 2004 version of Half-Life 2, every time you jumped forwards with W held down you gained a little bit of speed. Long version: ABH or Accelerated Back Hopping is an unintended side effect of fixing bunny hopping. Short version: If you jump backwards you go fast. Here�s their explanation why that�s so useful:
One of the first things you�ll notice is how most of the speedrun takes place backwards. Some scripts (such as a jumping and duck spam script) were used. The version of the game is from 2009, build 4104. Segmented means that the run was done in multiple parts so riskier and faster strategies could be used. Timing starts when the crosshair appears and stops when it disappears. In order to make this work, some parts of the run weren�t done consecutively, so that particular strategies could be employed: This incredibly fast speedrun of Half-Life 2: Episode Two was pulled off by SourceRuns Team, and they managed make it through Valve�s shooter in record time: 30 minutes and 36 seconds.
It�d be easy to assume the GIF above is the most impressive part of this run, but it�s not.
