how unusual?

Quirky. When I saw him he was wearing a suit with flip flaps and had his head in the clouds.

You might say, your usual scientist. Though he isn't really one.

yes, indeed a usual scientist of the more extreme variety I am a scientist myself but nerdy as I may be don't think as extreme :), no flip flops with my suits although my head is sometimes in the clouds

I know about being in the clouds ... I used to do science myself :)