Football Turnover Lab & Collision Physics
Inspired by notorious football mishaps like Clemson's backfield collision and the Jets' Thanksgiving butt fumble. Test collision vectors, ball carrier momentum, tumbling oblong bounces, and turnover EPA swings.
2nd & 8 at OWN 28
TIME: 0.00s
PRE-SNAP ALIGNMENT
Impact Force
0 N
Peak instantaneous deceleration
Fumble Probability
0%
Dislodgement threshold based on grip
Defense Recovery Odds
0%
Spatial voronoi / pursuit cone
Expected Points Swing
-0.00 EPA
Change in drive scoring value
The Physics of Backfield Collisions
In the famous Thanksgiving 2012 "Butt Fumble" and similar modern college replays, a quarterback scrambles directly into the posterior pad of his retreating pulling guard or center. Because the offensive lineman weighs 310+ lbs and possesses backward momentum while sealing an interior defensive tackle, the collision delivers an unexpected impulse against an uncovered ball.
- Impulse Mechanics: An arm carry without high-and-tight forearm wrap withstands less than 350 N of shearing force before dislodging.
- Oblong Tumbling: The prolate spheroid shape of a football creates an unpredictable restitution bounce angle (±35° lateral deviation per bounce).
EPA (Expected Points Added) Consequences
A standard turnover in one's own territory is the single most catastrophic play in football analytics:
- Pre-Snap Baseline: A 2nd & 8 at your own 28-yard line carries an expected drive value of ~+0.95 expected points.
- Scoop-and-Score Deficit: A fumble recovered inside the 20 or returned for a touchdown flips expected drive points to -6.95 EPA (a massive net -7.9 EPA swing).
- Spatial Voronoi: Defenders running forward toward the line of scrimmage hold immediate vector advantages over retreating offensive blockers.