9 Terrifying Diseases That Turn Your Life Into A Horror Movie

7. Constant Deja Vu

Okay, maybe you wouldn't think of Groundhog Day as a horror movie, but imagine if you found yourself trapped in a time loop. Is it a glitch in the matrix, or are you just going mad?

Exactly that happened to a 23-year-old university student. Shortly after starting uni, he began to experience increasing episodes of deja vu. These episodes began to get longer and longer, until he eventually stopped watching TV or listening to the radio, as he was convinced that he'd seen and heard it all before.

Deja vu can often occur just before a seizure in those with conditions such as epilepsy, but tests show that our unnamed uni student had no neurological abnormalities and was simply stuck in an inexplicable time loop.