Embarrassing Moment - Clumsy Moment

Last year, I had a great embarrassing moment. My friend is a great guitar bass player and, he invited me to go to a music festival at his school. He was really looking forward to it.
When it was 3pm, I asked my mom if I could go to his show, she said no, and I made up a lie, telling that I would go to cinema with friends. I put on my clothes and I left.
When I got there, they started to play, the music was amazing and it was very cool. My friend, Alexandre, had the idea of filming the show.
He started to film the show, making a lot of zoom effects, it was amazing.
When they stopped, I would show the metal symbol with my hand, but I couldn’t keep my fingers at the right position and, unintentionally, I showed my middle finger!
Everyone looked at me. I went red, then they started to laugh. I got out of there quickly and got home.
The funniest thing in this story is that I started taking up guitar lessons at that school later.

Antônio Minhoto 8ªC.