I was walking home once on a dark and stormy night... because of the rain I was walking at quite a pace, I just wanted to get home and get dried off. Anyway, I must have been about 100 yards from my house when I felt something hit my front-swinging foot. I looked down immediately, worried that I might have kicked dog shit or something, and realised that I'd kicked a frog! It sort of landed awkwardly, adjusted itself with a couple of hops, and came to a standstill right in front of me. Front and center of both my feet. I stopped and looked down at it for what must have been 3 or 4 seconds, silently in the rain. Then I said "sorry little fella!" -- and with that, he hopped away! It was almost like he was waiting for my apology!
I also say hi or meow to cats. Or a kind of silly psswsswss sound.
Someone asked do we all talk to strangers in the street... no but I often let onto them with a little nod or whatever, and to some I say hi or good morning or whatever.