Five-round experiment

Through the Tunnel: can you catch the exit?

Track the speed along the launch runway. Inside the tunnel, the mark vanishes completely. Press the key or tap the track at the exact instant you predict it reaches the exit line.

All five measurements stay strictly in this page and vanish upon reloading.

Attempt 1 of 5 Moderate speed

You can use Space, Enter, or tap the track directly.

The five attempts

Each row preserves where the mark sat at the moment of trigger.

  1. 1 Waiting
  2. 2 Waiting
  3. 3 Waiting
  4. 4 Waiting
  5. 5 Waiting

How the tunnel measures internal velocity

When a moving object slides behind an occluder, vision cuts out, but the nervous system continues running an internal kinematic simulation. In perceptual science, this ability is studied as time-to-contact estimation.

Decades of psychophysical findings show that observers do not rely on passive counting. Instead, the brain projects the trajectory forward with simulated momentum. Under high visual speeds or elevated focus, people tend to jump the gun (anticipatory bias); under prolonged occlusion, internal simulations often lag, producing representational deceleration.

This instrument records the signed difference between your trigger press and the physical arrival of the mark at the 90% gate line. Results reflect personal perceptual calibration as well as the display and input latency of your current hardware.