Does anyone have sporadic sounds?

when i go to the supermarket, i hum quietly to myself, it seems to stop the sound/air urge building up and eventually breaking out into something on a scale that other people find freaky.

I usually hum the same default tune but sometimes I have the presence of mind to change it to something i recently heard on the radio.

After reading everyone's comments, I realise I'm not alone in this. I also invent a humming tune sometimes on my way to work or use a tissue while I'm walking regardless if I need to blow my nose or not.

Other times after a stressful day at work, I recreate the Rock's entrance line at home. Maybe because I liked wrestling as a child and I recently watched Dwayne's show (Ballers) could be the reason I do it but it has been a stress relief mechanism for me.

When younger i did the "by the power of grey skull"  though i'd imagine many NT's did also..

I do the tissue thing also.Its almost like a prop!

When younger i did the "by the power of grey skull"  though i'd imagine many NT's did also..

I do the tissue thing also.Its almost like a prop!