No, really. We can't look away.

The animation above was taken from the video featured below, which appears to shows speaker cone undulating in hypnotizing slow-mo. It was created by photographer drummaboy5189, by playing a 61Hz tone through the speaker and filming it at 60 frames per second and 1/4000s shutter speed on his DSLR. The slight off-set between the speaker's motion and the camera's framerate gives rise to a mesmerizing rolling shutter effect.

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We've seen a similar effect achieved with water – but the slow-motion illusion seen here is just delightfully weird and otherworldly.

[drummaboy5189 via PetaPixel]