Slusny is an eastern Europe yoyo shop and community, they recorded some spintop tutorials for their customers:
This one, under the leg boomerang is also called the tunnel.
“We are team of Czech yoyo players brought together by modern yoyoing in 2010.
Our goal is to spread the passion and introduce yoyoing to public as a sport.
That is why we do free yoyo classes, travel and compete all around the planet, we sponsor and organize yoyo contests and we also run SLUSNY Yoyo Shop”