Temperature gun for brakes and bearings?

I used mine to read temps on springs in Yellowstone. Lots of people asked me how hot each spring was. And yes, I have checked brakes and disks, but more just to see if they all matched. Usually in a car or motor home, the smell is the first clue, but I can understand how important it could be for an airplane. Problem is that most american drivers have no idea about brake failure due to excessive heat. Just watch brake lights on other cars when going down a long interstate grade. Or trucks pulled off with smoking brakes on their trailer.