Verified answer

It's your biological clock. You subconsciously know when it's time to get up. I do the same thing, but I don't mind it. I'd rather wake up a minute before my alarm than an hour before my alarm or not at all.

set uur clock one minute before the time u wake up

uh-uh is so cool. good internal time. i do the same thing, and it so much better than that loud clangy alarm tearing through my dreams. i usually don't set it now......