Between Golshi swinging around an anchor and chain, Taiki spraying her revolver all over the place, Bolikri pulling out a sniper rifle, Rice/Grass/Flash/Rob Roy swinging their bladed weapons, Hishiama summoning a boulder to reenact Resident Evil 5, etc. all in the middle of a race... shooting a few tentacles out of your arm is prolly a-okay.

Especially when compared to using shady drugs to create a kaijuu-sized mandrake and then riding it.