Carbon has five minute-long wees. Literally five minutes. As I currently live in an apartment, that means public wees, and he's made so many passers-by laugh because they can't believe how long he wees for. He starts out lifting his leg but he gets tired and eventually the leg comes down, then the crouching stance becomes too tiresome too and eventually he's just standing there in a normal stance, still wee-ing his little heart out.
He didn't do it when he had access to a private garden in the Spain or the UK, so I think it's just him being smart. "I'd better do it ALL now 'cause who knows when she'll let me wee again!".