Outfield Safety Fence

[WindyCityBlue]

The Varsity assistant hits me with this one at the exchange of line up cards.

He was playing the day before at a field with a collapsible outfield (safety) fence. Bases were loaded and the ball is hit deep - both the Center and Right fielders converge in the alley. As they go back, the Center fielder makes the catch against the fence which is knocked down by the Right fielder as they collide. Both land on the fence (flat to the ground). The ball was caught and held, but the fielder that caught it did not knock the fence down, his teammate did. When they hit, both landed out of play.

Ever seen this???

Ruling???