No coverage

Last weekend, I spent half a day working from home and almost a full day working in the office. I had to get my designs out by Monday after spending almost two weeks looking at them. The design aim is to achieve best network coverage for our customer while minimizing interference. An example of my simulation showing the prediction plot:

I usually do not think much about work when I get out of office. Few nights ago, I was feeling rather exhausted after continuously working for days and went to bed before Adrian. When he came in, he heard me mumbling, and thought I was talking to him. He said I sounded like I was half complaining and half telling him off. It wasn't clear, so he kept asking me what it was. I got rather annoyed and started drawing 3 circles on his palm, feeling too tired to explain. He was still puzzled, so in the end I gathered my energy and uttered "No coverage!"

He immediately left me alone and went to bed.

The next morning we had a good laugh, but perhaps I need to learn how to shut down my brain during my sleep.