Wave back.

I remember when I was 9 in Australia, going with my mom to buy groceries. I stayed in the car with my brother.

Then I saw a buff man (Australian), wearing singlets, black tracksuits and a dogtag. He was carrying groceries and walking back to his car.
Then he looked at ME I didn't know what to do, so I just smiled and waved at him (It's what we were taught to do at school). And OMG, he grinned and waved back at me which made my day ^^

I drew this, just for an anatomy practice, I happen to draw the right pose for it & I drew him as wolf