I once told my parents I was going to do some school work. Instead I got high and went to a amusement park instead.
Did any friends of yours go to that same amusement park with you?
No, no friends of mine are anywhere close to being that stupid.
Lying to your parents is what you did on a whim. This is so not cool, they need to know where you are at every given time. Next time think about how you would feel in their place not knowing.
No matter what I say they wouldn't understand.
If you were more honest with your parents they might get you more. You should work on being up front and more trustworthy.