I do now think it is funny that people are of the opinion that a ball can spin more than one way, or that a golf shot of over 200 yards has "topspin." If you think about it, it's completely "common sense" that a round, fairly solid object could only spin around one axis at a time. But, at some point I believed the "backspin & side spin" thing too.
As far as topspin, it also should be completely logical that a long golf shot doesn't have it. After all, if you watch someone hit a tennis ball "topspin" shot, the d#$m thing dives toward the ground over the net. If golf balls actually had topspin, they would crash into the ground 10-30 yards in front of the tee box.
Nevertheless, people still believe this stuff, I suppose.