It looked like the trailer lifted the back end off the road. It was a slight curve and the trailer tongue lifted the bike and threw it to the right. It was a Harley so I doubt it could do a "stoppie" under normal circumstances.
Smoky
Built this trailer in '95 or so, been occasionally using it when and if I need to since then, towing it with a Suzuki GS850.
Pay no attention to the doomsayers, if you need a trailer just get one (or build one).
There's a Delphi forum relating to trailers, where you'll find all you ever wanted to know.