I must be missing something here. Today, my school held an SSBB practice tournament, and I used Marth. When I used his FS in midair, it missed everyone and Marth flew off the stage (Final Destination). However, he stopped once he reached the side of the screen (in the air). Marth suspended there and puts his sword back into his fighting position. The Smash Ball effects then wear off and then I jumped and Up B back on stage.There is only one downside to the ultimate final smash, if you use it in the air and miss, it is instant DEATH!
I iwish I have video proof of this...