On phone to waste time and try to look normal.

I often pull out my phone (like right now) while for something (like a class or appointment) in an attempt to waste time and appear normal. I'd prefer to just mindlessly stare into a void but people seem to find the offputing especially if they are in front of me.

Anyway, it's always fun when I'm done checking emails and texting friends so I run out of things to do. I hate scrolling anything while I wait and I don't want to play any games in case someone looks over my shoulder so I thought why not make a post. I of course can't do this everytime. So does anyone else struggle with this or possibly have suggestions of what to do while waiting?