There are probably a lot of people on here who can answer this a lot better than me, but I'll try. Yes, it's a lick to end a phrase and begin a new one. If you've listened to bluegrass music, you've probably heard it a zillion times and didn't realize it. I'm sure Devin has a lesson on this site that shows it and you'll be able to find several videos on YouTube. Like I said, others can explain it better, but I hope this helps some.

https://video.search.yahoo.com/yhs/search;_ylt=AwrEeBm9hcdbHxkAlTcPxQt.;_ylu=X3oDMTByMjB0aG5zBGNvbG8DYmYxBHBvcwMxBHZ0aWQDBHNlYwNzYw--?p=what+is+a+guitar+g+run+bluegrass&fr=yhs-pty-pty_converter&hspart=pty&hsimp=yhs-pty_converter#id=1&vid=51b934cf43406af3fe2ac2becb5ade16&action=view

If you use that link, you'll have to copy/paste the whole thing to get to the page.

Thanks Larry...