Non steps on your foot at Suvarnabhumi Airport and profusely apologises. How would you react?

I'd probably keep looking down and saying "It's okay, it's okay".. until I look up and see that it's NON! 8D Then maybe I'd grab the opportunity to chat up a storm with him :p

If we were on the same flight and there were vacant seats near him, I'd probably take one of those seats for myself so I could talk to him more ;)

Ask, and you shall get answers. They won't always make sense, though. :D