Superhuman Speed

Sometimes called "enhanced speed", Superhuman Speed is a term used to describe the ability of some characters to move at a rate of acceleration and maximum speed in excess to that of normal optimal human capacity.
However, this power is not without any ill effects, as it can strain the body, although some users may be resistant or even immune to the effects of high speed travel, including friction, g-force, inertia, etc.
=== Characters who have it ===
David Cosloff 
Seth Ashton
Implosion
Dark Alpha
Professor Death
Reversed Alpha
Chaotic
Demon Alpha
Quicksilver (Pietro Maximoff)