Frontside impossibles are sometimes called heelside impossibles and are impossibles that spin frontside/vertical instead of backside/vertical as impossibles usually do.
Animated gif for the fs impossible
I recommend to learn the plasma spin first.
Then to do the frontside impossible you can try this method:
-do exactly like you would for a plasma spin but force yourself to cancel the frontside body varial to land regular instead of switch.
Tip:
-try to control the board with your back foot to prevent unwanted 1/4 flipping when you cancel the body varial.
-be careful, this trick is not easy and the landing can be dangerous.
Variations:
-you can break a frontside impossible halfway with several things, for example you can do a 1/2 frontside impossible late 1/2 heelflip.
Animated gif for the fs impossible
I recommend to learn the plasma spin first.
Then to do the frontside impossible you can try this method:
-do exactly like you would for a plasma spin but force yourself to cancel the frontside body varial to land regular instead of switch.
Tip:
-try to control the board with your back foot to prevent unwanted 1/4 flipping when you cancel the body varial.
-be careful, this trick is not easy and the landing can be dangerous.
Variations:
-you can break a frontside impossible halfway with several things, for example you can do a 1/2 frontside impossible late 1/2 heelflip.