yeh flail is 360 frontflip.
180 frontflip = mistyflip, see yourself. go video.google.com or youtube.com and type mistyflip and you will get like 40 videos where inliners and snowboarders are doing 180 fronts. if you type flail then you will get nothing. and if you type flail in youtube or google you will get nothing. you can google bmx trick flail in google and whatever, even in dave mirra freestyle bmx there is:
Code:
Flail = Front Flip+360
Flair = Back Flip+180
and basically mistyflip is easy, ive tryed few at trampline without scooter and got pretty close but with scooter i have no idea if it is. someone should try it to foam ;P