False fart

So i recently got into a little mishap. It was a rainy day and I was sitting in class minding my own business. Since the seats are organized in close columns i decided to rest my tired foot on the side of the seat in front of me. My rubbery soles slipped on the wet metal. Pfrrrrrrt. A few students nearby looked in my direction. My friend turned around in disgust. "Did you fart?" I gulped and replied no it was just my shoe sliding on the desk. "Sure.." he said. My face was starting to feel fuzzy and hot. "Look man im serious ill show you." I positioned myself like I was before with my shoes on the desk. I slid them but no sound came. Again i tried but nothing. My friend just shook his head. The bell rang and students began getting up and out of class. Zippers zipped and books closed in the bustle of activity. I remained there frantically sliding my shoe across the leg of his desk. I couldnt make my shoe fart. My friend stood up from his seat and stared at me. "Its ok bro. Everyone does it. But just try to hold it in when youre in class." He grabbed his books and walked away. I stayed in the empty class rubbing my soles against the metal. My face was red with embarassment. I couldnt make that sound again. Couldnt prove to everyone that im not a farter.