Mets rookie Jefry Yan made his strikeout celebration one for the highlight reel. After recording a K, Yan launched himself into the air with his legs spread wide, landed hard on the front of the mound, and slapped the grass with his left hand while dropping to one knee. The over-the-top gesture quickly went viral on social media, earning him some attention in his early days with the organization. It's the kind of raw exuberance young players bring to the majors, especially when they're out there competing in their first games. Yan's got personality, and he's not afraid to show it. Whether the celebration sticks around or becomes a one-off moment depends on how much success he has going forward. If he keeps striking guys out at this clip, expect to see that knee-drop again.