<human>: Give me the gist of the text in a nutshell

Throughout the summer I teach a class showing kids how to make video games.  This class usually brings all kinds of walks of life and one week I had a pretty sweet kid who clearly had Tourette Syndrome.  Every 20-30 seconds the kid (we'll call Tweek) would have an involuntary tic.  Thankfully the other students in the class  didn't seem to notice or if they did they didn't care, however every time I called on Tweek I subconsciously kept on trying to call him Twitch (I mean hell his name was nearly twitch anyway).  
        The class was a week long and I made it to Thursday with several close calls, but was able to keep my senses about me and call Tweek by his real name.  However, midway through Thursdays class Tweek raised his hand and I call out "Hey Twitch! Whatcha need?"  All the students look up from their computers and start asking "Who's Twitch?"   My mind goes straight into straight into panic-mode and instinctively responded with "Twitch? I said tweek, what are you all talking about?"  After several suspicious glare form children the seemed to move on and thankfully none of the students were able to put together his involuntary tics and me calling him twitch.
<bot>: TIFU by accidentally calling a child with Tourettes "Twitch" to his face in front of the whole class.  No one put Twitch and his tics together.  I felt terrible.