http://www.sciencemag.org/news/2020/07/mysterious-case-man-who-can-read-letters-not-numbers-exposes-complex-roots

A man attempts to draw what he sees when looking at an 8. Numerals fail to register in his brain.

In the video, the man sounds creeped out. “This is too strange for words,” he mutters. He’s holding a plate-size, green foam 8. When upright, it looks to him like an incoherent jumble. But when he rotates it 90°, the shape snaps into focus; it looks like “a mask.” He begins to rotate the numeral back and forth, watching it melt and cohere over and over. He finally hands it to a nearby scientist, saying, “You gotta take that away.”