I get it reasonably often when I'm coding my projects late at night, when there's nobody there to bother me. The downside is that it messes with my sleep, since

I get it reasonably often when I'm coding my projects late at night, when there's nobody there to bother me. The downside is that it messes with my sleep, since I'll start at midnight, write some code, think "okay I need to go to bed by 1 because I haven't been sleeping well" and I look and it's 5 am.