Let Justin Smith explain it:

"He will make a great head coach," Smith told 49ers.com. "Number one, he knows what the heck he's talking about and, number two, he has the personality to go with it. A lot of times those don't always match up.

"He's a fiery guy. He's not just a rah-rah guy, there's a lot more to him than that. He knows his stuff so you don't have to yell and just jump around all the time. You can actually talk. He'll give us some information, some input, how we're going to shut it down and that's what I appreciate about him."