INJURED PARTY WAS REACHING OUT TO LINE UP A PIECE OF PLASTIC WITH A 2X4 TO SLIDE PLASTIC IN BOT-OM OF FEEDER. HE REACHED OUT AT THE END OF FEED-ER AT THE TOP AND THE PLASTIC WHICH EXTENDED OUT ABOUT 15"" BUCKLED DOWN AND DUMPED HIM TO THE GROUND FALLING APPROX. 7'. HE HIT THE GROUND WITH HIS FACE WHICH CAUSED THE INJURIES THAT HE SUS- TAINED. WAS THEN TAKEN TO E.R.