Plywood on an Aosom Bike Cargo Trailer?

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Two sheets of 5/8 inch plywood weigh 100 pounds. This is the most extreme load I can imagine carrying on an Aosom bicycle cargo trailer, when I need home repair materials and do not have enough to justify a $$$$ truck delivery. Assume a one mile trip on back streets, slow travel, extra caution about traffic, clear daytime weather, no wind.

Yes, it borders on insane. But then:

http://www.funnyjunk.com/Heavily+loaded+motorcycles+in+asia/funny-pictures/5552474/

Hold my beer and watch this!