Sorry about the wait, just realized that I wasn't subscribed to my own thread, so yeah there's that.
Trunks forms a single handseal to concentrate his swift chakra into his lower body. Taking off with his dominant left leg, Trunks infuses swift chakra into every step, moving at speeds that would render him a blur to everyone but Sharingan users. Transversing the training grounds in a fraction of a moment, Trunks then allows his movements to somewhat slow as he begins to bounce around the target. With each bounce, Trunks lands another strike, and then bounces away from the immediate area to another angle for the next blow. He lands around 10 blows this way before stopping and allowing his swift chakra to fade.
This technique is simple, yet effective because of the speeds that we are working with. It would be easy to see how you can overwhelm your opponent with little effort thanks to this technique. That is, everyone but Sharingan wielders. They would be a natural counter to this jutsu, given their eyes could see my movements, maybe with enough time to form a counter. Other than that, it seems this technique is pretty evenly balanced in both practical use and attack reasons
Trunks forms two handseals to concentrate his swift chakra once more. This time, however, he doesn't run, but instead begins spinning at high speeds. Mirroring a stationary tornado, Trunks begins throwing all of his weapons that he can, shuriken, kunai, senbon. All going in every direction all at once. Slowing his spins, Trunks begins to speak.
This is a handy technique for those who use this fighting style, such as Ten Ten. And it could also be good for when you find yourself outnumbered and/or surrounded. However, with your focus being on your foot and hand speed, you are open to attack from anyone behind a protective structure of any kind, which makes it really risky.
Trunks forms one handseal to concentrate his swift chakra into his legs once more, this time running in a circle about 3 meters in diameter. Increasing his speed to insane levels, Trunks pulls all of the oxygen in the area out, creating a vacuum of sorts around his target. Slowing down, Trunks tells his teacher about the technique.
This could be a handy technique, if used with the right jutsu, or fighting style. Instead of looking to directly hurt the target, it simply incapacitates them, depriving them from oxygen. I also like the fire retardant property, that could really help against certain opponents. Again though, while doing this, I am open to attack, so I'll have to be very careful about using it