Opportunities...

... for candid street photography are rare at the moment, with far fewer people around town.

So, when you spot a possible subject, you shoot first and check later. 

That's why my first shot of this chap doesn't have the top of his head. 

I took a couple more shots but this had the best facial expression, presumably as he explored tips on boosting his energy (other than imbibing the energy drink in the can next to him).