Let's use common sense when warming up engines.

I just double-parked at a cafe in Yeonhui-dong, Seoul, because the owner said it was okay, and then went inside with my group.
About 10 minutes later, I got a call asking me to move my car.
The person spoke quite rudely, asking why I double-parked, so I told them the owner said it was fine, and then I got into my car.
I moved my car and waited for that guy to leave, but he didn't.
I waited for about a minute, but he didn't move.
When I asked why he wasn't leaving, I went over to check, and he was vaping and saying
that he had to warm up his engine.
When I let out a long sigh, he must have felt awkward because he finally moved.
Everyone, please, let's just live like normal people.