What band is this? Every band ever? What’s with the kaleidoscoped cityscape? Lots of questions, I don’t know. But this song, titled “The Wolf,” sounds like the bounciest and most fun midlife crisis anybody’s ever had. (It also sounds like a banjo could and should come in at any point, but it won’t. No matter how badly you want it to. RIP, banjo.) The rest of reinvented Mumford’s new album, Wilder Mind, comes out May 4. Get ready to jump and cry at the same time.