Well, yes it does happen, specially if you pull too hard during gyro flop. In fact, it happened to me twice during compulsories! One of those times it made me miss the trick
. But the other was an amazing save: it came out while throwing the one-handed trapeze but it still landed on the little stub and I could correct and spin it on my hand!
I know Jon Gates has told Dale from YYJ to get rid of them. But some like them because they are easy to mod. Mark Hayward used to make them more pointy for doing things like finger spinning in his performances. At one point Alan and myself we did "tip extensions" to facilitate some tricks. I will post a picture of some modified tips later.
I used to play with YYJ tops a lot as those were the ones I used for bearing tricks on my freestyles. But now that they are collector items I am more careful with them.