The Stopped Clock Illusion

Chronostasis (from Greek χρόνος, chrónos, “time” and στάσις “standing”) is the illusion in which the first impression following a saccade (quick eye movement) appears to be extended in time. The most well-known version of this illusion is the stopped-clock illusion, where the first movement of the second hand of an analog clock, following the viewer’s directing attention to the clock, appears to take longer than the next movement. When eyes execute a saccade, perception of time stretches slightly backward. The viewer’s brain registers that they have been looking at the clock for slightly longer than they really have, producing the illusion that the second-hand is frozen for more than a second. Although this happens every time the eyes move from one fixation point to the next, it is rarely noticed. One explanation is that the brain is filling in the gap while the eyes move from looking at one thing to the next.
Source, Via: Youtube

Outstanding-The Gap Band

The Gap Band Outstanding. LINK: Youtube

Two-inch gap at 35mph?

She didn’t have to swerve, or even apply the brakes. With just a flap and a twist this swallow swooped through a two-inch gap in a locked barn door.

She managed to maneuver all 14 inches worth of wingspan inside without ruffling a feather.

The astonishing display of aerobatics was captured by a photographer sitting in the agricultural shed.

Wildlife photographer Keith Ringland, who took the pictures, said: ‘The swallow used a different, much bigger hole in the roof to leave the building. LINK