As displayed in the Reddit embed above, you have to play as Octane to utilize this new movement trick since you need the Launch Pad. First, you need to acquire an EPG-1 in Apex Legends.

In an attempt to calm fan fears, Apex associate live balance designer John "JayBiebs" Larson took to Twitter to explain the team's thinking in removing the fan-favourite trick. For context ...

How to use Octane's Stim to increase weapon accuracy in Apex Legends? Using this trick is pretty simple. Players must use a magnified scope like 2x or 3x to perform the trick.