That sort of manic movement is, I think, what really sets apart the elite FPS players of the Doom, Quake, and UT era
In those days, my friends and I used to get into UT quite a lot. Most of the more experienced UT players I watched would use the double-tap of the left/right arrow button to trigger the short sideways leap as a means of rounding a corner (for a better chance of surprising an enemy), or to make it harder for an enemy to keep a bead on them when they were being fired on. I was always surprised at how - to me at least - this simple mechanic made such a difference to how dynamic the combat felt.
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In those days, my friends and I used to get into UT quite a lot. Most of the more experienced UT players I watched would use the double-tap of the left/right arrow button to trigger the short sideways leap as a means of rounding a corner (for a better chance of surprising an enemy), or to make it harder for an enemy to keep a bead on them when they were being fired on. I was always surprised at how - to me at least - this simple mechanic made such a difference to how dynamic the combat felt.