I don’t know why it’s only mentioned in one comment deep at the bottom, but the claim about hair color and gravity is completely implausible, far less believable than the spheres and spanking. Whereas speed is directly by definition related to distance/space and time. As noted in one of the comments, about the color it would be logical to the same extent if at some point it became invisible. Well, or vice versa, transfer gravity to the part about speed and say that it is the effect of displacements in time.
I don’t know why it’s only mentioned in one comment deep at the bottom, but the claim about hair color and gravity is completely implausible, far less believable than the spheres and spanking. Whereas speed is directly by definition related to distance/space and time. As noted in one of the comments, about the color it would be logical to the same extent if at some point it became invisible. Well, or vice versa, transfer gravity to the part about speed and say that it is the effect of displacements in time.