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Wait for the signal, then react as fast as you can.
Click or tap the panel when it is ready. Space or Enter also works. Start begins an attempt; Restart runs another.
Lowest clean reaction time in milliseconds. False starts do not count as a best time.
Reaction Test is a wait-then-strike drill. The panel stays idle on purpose, then flips to a ready state. Tap as soon as that happens. Tap too early and the attempt is a false start, not a fast time. The score is milliseconds from cue to tap, so a smaller number is better. The fastest clean attempt stays on this device.
Drop crates and keep the beam level.