There's a glitch which allows people to use the Boomstick Alt fire mode to jump into the central part of Steam Fortress. It's been around for a while, but due to everyone copying eachother, I now see it in every single game on that map.
There are loads of videos on it, e.g.
https://youtu.be/f023nHUjVsg
​​​​
There are loads of videos on it, e.g.
https://youtu.be/f023nHUjVsg
​​​​
Last edited: