So all day today at home I've been switching back and forth between two different shirts, one white and one red, to see if anyone notices and says something. It only takes 2 seconds for me to switch between shirts. For example, my little brother came from the kitchen and punched me, so I went up to him (him hiding behind my mom) and told him to watch his back. I had the white shirt on. So I walked backwards behind the fridge and all the while maintaining eye contact with him (my mom watching) and peeking over the top of the fridge I switched to the red shirt and went up to him again (took no more than 5 seconds from when I walked backwards with the white shirt on and back forth with the red shirt on) to see if they would notice. They didn't. It's a pretty nice trick and a good experiment to see how much attention they pay to what's right in front of them. I'm having fun and I'd suggest you guys try it too. The trick only works if you're willing to sacrifice a shirt (you have to cut it). Nice trick for you to try with friends or family to see if they notice.. Just thought I'd share