"YRN", a weirdly Salsa-flavored trap joint from the two comes to mind, and they've done it again with the simply titled "Freestyle".
The consistently impressive Honorable C-Note provides the beat for the track, which definitely has a spontaneous feel to it-- though pretty much all work from the two acts is built off of that kind of energy, so it's difficult to tell if this is an authentic "freestyle".
Thug has a few new collaborative projects in the works, including mixtapes with Rich Homie Quan and Peewee Longway.
Look for those soon.
Me and Young Thugger
We drink mud and trouble
My pockets inflating
Like I blew a bubble