I had a friend who sent me a “Y2K fix” program back in '99. Said it would patch the error so I’d be safe. When I ran it, it swapped the letters Y and K on my keyboard.

Metroid for sure.

SNES Jurassic Park. NES Fester’s Quest

Here’s a weird question: do you have a gallbladder? People without a gallbladder tend to have that experience with edibles, or need a higher dose to get an effect.