Null Structures

Ok I was working with pipes night and I notice something that I never knew about. Did you if you wanted to add a null structure between two pipe section (if there is not null structure present) that you can simply just select on of the pipes, right click and select connect to part and select the other pipe, it will automatically created a null structure for you? Wow I hope I wasn't the last to know about this lol. See image below.