Apeiron Experts (Centipede on the Mac)

I consider myself a pretty high-level Apeiron player, my top score is over 4 million and my top level is 437.

There’s really only one thing I still can’t quite figure out.

What EXACTLY triggers extra centipede heads on the bottom after one goes all the way? Sometimes they apepar in a rather leisurely fashion, other times they are like the candy line in “I Love Lucy” - is it when one head that has been on the bottom hits a mushroom and turns? hits the other side and turns? I watch really carefully and I cannot figure it out.

Also…anyone know if there’s any rhyme or reason at all to the psychedelic mushroom? I love that thing and it’s so damn hard to get them!