It's the one about Trump being involved in the death of Princes Diana. Apparently shortly after Princes Diana divorced Prince Charles Trump tried to get a date with her by sending her thousands of dollars worth of roses but she wouldn't go out on a date with him. The conspiracy goes on to suggest that Trump was heart broken by the rejection and he might of starting thinking that if he couldn't have her nobody would and arranged the car crash. Thats actually the only conspiracy theory I seen on this site and I was the one that tried to start it but like every conspiracy theory there are a few facts behind it. Cheers!
Nanoose 