Coach around here has an ingenious 'trick' play:
Try for Team A:
Formation: Snapper on far right hash. All the other 6 offensive linemen are on the left side the middle of the field (all outside the free-blocking zone). The remaining 4 players are behind the line. One is a QB, one is a RB, and the other two are lined up as sort of tight-ends/receivers to guard the outsides of the line.
The offensive linemen are all grouped together but are BACKWARDS . The snapper hikes the ball either diagonally to the RB, or back to the QB who pitches or throws to the RB who is behind all the backwards offensive linemen.
The idea is that the defense cannot block the linemen, because this would result in a block-in-the-back penalty. The coach even reminds the referees (in effect, reminding the defense) to watch for blocks in the back.
The running back 'protected' by this 'impenitrable' shield, finds a gap, the offensive linemen let him through, and he runs the few yards into the endzone.
Is there anything illegal about this? It sure confuses the defense as they don't know what to do, and don't try to block the offensive players, thus not getting the push, and 'allowing' this 2 point conversion.