Big Spin

All three tutorials agree that the backside bigspin is a 360 board scoop combined with a 180 body rotation, and that the shoulder wind-up before the pop is the primary source of rotation power. Tom's Tutorials highlights the center-of-tail back foot placement to prevent accidental flipping. Braille uses the pop shove-it catch drill as a stepping stone and emphasizes the hard 360 scoop from the back foot. Skate IQ provides the deepest technical breakdown: loading by squatting until the back shoulder passes over the front toe, striking the center or heel side of the tail to keep the board flat, and choosing between an early front-foot catch at 90 degrees or floating the full 180.

• →Back toe stays in the center of the tail with griptape visible, not hanging off the edge; center placement keeps the board flat and prevents an accidental kickflip
• →Wind up by squatting until the back shoulder is over the front toe before launching; this stored rotation is what powers both the board's 360 spin and your 180 turn
• →Jump first, then strike the tail into the ground; pressing the tail down while still on the board traps it and kills pop height
• →Drill a pop shove-it while catching the nose and rotating the shoulders 180 as a stepping-stone before committing to the full in-air bigspin

Synthesized from the top video tutorials. Watch them