I highly doubt it was actually 20 minutes, seeing as your pupils would have melted within your eyeballs in that amount of time...but thought it may not have hurt you, you're still going to make yourself blind if you keep it up. Listen to mommy "don't stare at the sun"
The ability to see should not be taken for granted. Same goes for listening to music that's too loud. Once you ruin those things, they're gone forever. Take better care of yourself, because it's all you have.
KILL YOSELF FOOL!!!
Nah J/P. My advice to you, stop staring at the sun. :D