Start it, then arrive as the third man. Play into feet, support, and time the run beyond so C can release you into the space behind the line.
A plays into B, B lays off to C, and C plays A through on the third-man run. Emphasise a clean pass into feet, a first-time lay-off, and A timing the run to arrive as C plays it. Rotate the roles so everyone runs the third man.
Fork it into your private drills, then change the animation, adjust positions, swap equipment, or drop it into a session block.