Reactions

In fiction, movement over long distances and movement over short distances - which can be dubbed "combat distances" - tend to be remarkably different for different characters, resulting in serious discrepancies when considering their overall speed. On this wiki, we therefore differentiate between various types of speed, including reaction speed.

Reaction speed is defined as a single movement in a defined timeframe, which a character has been shown capable of. A series of movements in similar timeframes makes this combat speed, so this term should only be applied for a single, quick movement. Examples include ducking backwards to dodge bullets and diving away to dodge extremely fast vehicles.

When measured in terms of a single movement of often undefined, small distance, humans have displayed between 300 millisecond (subhuman) to 100 millisecond (peak human) reactions. Autonomous body reactions for humans can also reach as high as 40 milliseconds, but this is oftentimes inapplicable to reaction speed and shouldn't be used.

## Rules Regarding Reaction Speed and Scaling

1. Reaction speed has both a distance and a timeframe component, so all calculations that are completed for reaction speed cannot simply be a timeframe by itself. Do not randomly assume a 1 meter distance for each timeframe and use that speed for the reaction speed.
2. If only a timeframe is known (for example, characters who do not need to move to attack or defend), then it is still possible to list that timeframe in parenthesis in the speed section of the character profile. It may also be listed in the skills section of the profile or as a feat.
3. If character A can blitz character B, A's movement speed may be scaled to B's reaction speed.
4. If character A is considered an equal in combat to character B, then reaction speed may be scaled if there is no discrepancies or showings that suggest the opposite.

## Reaction Tiers for Reaction Timeframes Only

**Normal Human perception:** 0.3-0.129 seconds

**Athletic Human perception:** 0.129-0.102 seconds

**Peak Human perception:** 0.102-0.08 seconds

**Superhuman perception:** 0.08-0.0291 seconds

**Subsonic perception:** 0.0291-0.00583 seconds

**Subsonic+ perception:** 0.00583-0.0032 seconds

**Transonic perception:** 0.0032-0.00265 seconds

**Supersonic perception:** 0.00265-0.00117 seconds

**Supersonic+ perception:** 0.00117-0.00058 seconds

**Hypersonic perception:** 0.00058-0.000294 seconds

**Hypersonic+ perception:** 0.000294-0.000117 seconds

**High Hypersonic perception:** 0.000117-0.0000588 seconds

**High Hypersonic+ perception:** 0.0000588-0.0000294 seconds

**Massively Hypersonic perception:** 0.0000294-0.00000294 seconds

**Massively Hypersonic+ perception:** 0.00000294-0.0000003336 seconds

**Sub-Relativistic perception:** 0.0000003336-0.0000000667 seconds

**Sub-Relativistic+ perception:** 0.0000000667-0.00000003336 seconds

**Relativistic perception:** 0.00000003336-0.00000000667 seconds

**Relativistic+ perception:** 0.00000000667-0.000000003336 seconds

**Speed of Light perception:** 0.000000003336 seconds

**FTL perception:** 0.000000003336-0.0000000003336 seconds

**FTL+ perception:** 0.0000000003336-0.00000000003336 seconds

**Massively FTL perception:** 0.00000000003336-0.000000000003336 seconds

**Massively FTL+ perception:** anything less than 0.000000000003336 seconds

(Credit to Versus Battles Wiki)