wham-cam Wham Cam: Why Do Knuckles Crack? Ever wonder why knuckles crack? Joe Snedeker explains why our joints make that popping sound, in this week’s Wham Cam. More Videos Next up in 5 Example video title will go here for this video Next up in 5 Example video title will go here for this video Ever wonder why knuckles crack? Joe Snedeker explains why our joints make that popping sound, in this week's Wham Cam.