<human>: Can you succinctly summarize the text in 1-3 sentences?

Me and my friend have this inside joke, don't ask, but we just touch each others shoulder and keep it there for a little bit while looking them dead in the eyes and saying "Scooby Doo"

While walking to my first class on campus, I thought I saw my friend walking in front of me.

I ran up to him, gently put my hand on his shoulder and said "Scooby Doo" with the most intense look on my face.

In doing this, I realized it was not my friend. He looked horrified. What made it even worse was he didn't speak English, so when I tried to play it off by saying "Sup man, my names *TubbyFlubby*" he couldn't really respond too well.

I decided to walk away immediately after, and a girl from my class noticed and told it to everyone. I feel kinda bad for the guy.
<bot>: Gently touched a Mexican man's shoulder, who did not speak English, looked him dead in the eyes and said Scooby Doo.