i think it's not that unrealistic since he hits it with his left foot while falling, it won't spin backwards properly obviously but it can curve a little bit after the bounce (& be slowed down because he hit in such an unusual stance who gave it an unreal angle)
so i guess it's a bit exaggerated but the idea is there, if the spin showed there is going towards the inside of the field (which is the case because it goes straight to Yuuma) & not the right side, it's acceptable. the spin seems very strong right since kiriki makes the pass