That was not my sister

For me, awkward moments just aren't too many, because every time I do something ridiculous I can't help laughing of myself. But that is now that I'm not a child.
When I was six, my mom, my older sister and I were in a craft fair in Los Ángeles. While we were there I was amused with a handmade red train. And when I stopped looking at it and turned around to look out for my mom and sister, all I could see was butts. I kinda freak out a little bit, but I calmed down when at the end of the aisle I recognized my sister. So I run over her and once I got there I pinch her in the back, really hard, as I used to do. 
The girl turned around. She looked at me with a really confused look, as my entire body turned red. I swear for my life, that I never ever felt more ashamed than that moment. I didn't know where to go. Luckily for me, I heard my mom voice calling me, so before I babble an "I'm sorry" I ran to her. 
-What happened you? Why are you so scare? - my mom asked.
-Nothing...I just thought I was lost- I answered.
Looking back to that moment, I realize that it wasn’t that awkward, but back then for me was a very terrible situation.