The Tush Push, a.k.a. the Brotherly Shove, is the quarterback sneak play run by football teams in short yardage situations, most notably by the Philadelphia Eagles.  In my opinion, this is the best thing that's happened to football since the Wildcat Formation was used by the fledgling Miami Dolphins to trounce the almighty New England Patriots, and then subsequently copied by everyone until defenses eventually figured out how to stop it.  For the Eagles, the Tush Push is about 90% effective, which is as close to a "gimme" as you can get in any situation in any sport.  It's a no-brainer; if you're in that situation, you run that play. 

But the interesting thing is that it's heavily dependent on personnel.  You need an offensive line that executes a specific thing exactly right, you need big strong running backs and tight ends to push, and you need a quarterback with a strong lower body who can take an initial hit and keep churning his legs.  The Eagle's quarterback Jalen Hurts is the ideal person for this role, both because he's relatively short and sturdy, and also because of his weightlifting prowess.  It's kind of funny to watch other teams try and fail to duplicate this play, either because their timing is off, or the offensive line doesn't quite get the motion right, or simply because their quarterback isn't athletic enough. 

There's nothing illegal or dirty about this play, and it's not particularly complicated.  Defenses know what's about to happen; they just don't have the physical ability to stop it.  It's just an us vs. them play -- Does our offense have more strength and grit and skill than their defense.  So it's kind of funny that people want it banned because it's unimaginative and ruining football.  It's not.  Figure out how to stop it, and then adopt it for yourselves. #sports