He has real speed, true breakaway speed. His highlights are fun to watch, really. He is very smooth. When a lot of backs are at full speed, running away from people, they are working it, running hard, pumping their arms, etc. This kid looks like running fast is the most natural thing in the world to him.
Making quick cuts, however, not so much. Check this highlight tape:
https://www.youtube.com/watch?v=CEDaTV4p28o
On all his long runs, I love how when he is at top speed, he barely pumps his arms. But in the early runs on this video, his cuts are kind of comical, he runs high, so he needs to windmill his off-ball arm to make the cut. And we aren't talking about real deep cuts here. Later on, he makes some real nice short choppy cuts without doing that, so maybe it was an isolated incident or two.
7th round pick, that's not good, tho. Not at all. Every team in the NFL deemed him essentially undraftable. With those physical skills.
This is when some unoriginal bonehead brings up Arian Foster.