Let's say I am working on project A from 09:00, and suddenly at 09:30 I receive an unexpected phone call about project B. The phone call lasts until 09:50, and then I resume my work on project A.

Typically after the call at 09:50, I would correct my time tracking by doing something like:

watson stop --at 09:30
watson start --at 09:30 projectB
watson stop 
watson start projectA

My feature request is to add a new command, watson interrupt, that would behave like this:

watson interrupt projectB --at 09:30
> Added projectB from 09:30 to now. Restarting projectA.