knight laughed revealed he hopes floyd mayweather will come to his aid this weekend .
the rap mogul was refused an appeal to have his bail reduced from $ 5 million as he awaits trial for murder and attempted murder .
the 48-year-old has been plagued by medical ailments since being charged with murder and attempted murder in january - collapsing in court .
appearing distressed , knight then had to be wheeled out of court in a wheelchair .