Scrimmage Kick Bruhaha

[mikesears]

Let's get our minds revved up again.

Play:
4/10 at the 50-yard line. Team K snaps the ball with 5 players in the backfield. K1's punt is high but somewhat short. K2 released downfield at the snap and the ungrounded kick hits him in the back at R's 30-yard line. R1 was coming up to make the catch but had to stop so he didn't run into K2. The kick hits the ground at R's 32-yard line where R3 picks the ball up and begins running with it. During this run, R4 is flagged for holding at R's 35-yard line. R3 goes out of bounds at R's 40-yard line. After the play, R5 is flagged for a dead ball personal foul.

Options?