Final answer:
The tricks mentioned are skateboarding tricks: 360 Double Flip, 360 Nightmare Flip, and Double Varial Kickflip.
Step-by-step explanation:
The tricks mentioned in the question are skateboarding tricks.
360 Double Flip is a trick where the skateboarder rotates 360 degrees while performing a double kickflip. This means that the skateboard spins around twice and flips twice before the skater lands back on the board.
360 Nightmare Flip is a trick where the skateboarder performs a 360-degree rotation while doing a kickflip and a heelflip at the same time. It's a challenging and impressive trick.
Double Varial Kickflip is a trick where the skateboarder combines a varial flip and a kickflip. It involves a pop shuvit motion and two kickflips, creating a complex combination of movements.