Sure, Gen Z is the generation after the millennials, and the birth years would be 1995 to 2012, so the leading edge is already 23 and gainfully employed.
What happens is that the normal wave-like contractions of the intestine, called peristalsis, grab this leading edge and pull it into the part of the bowel ahead of it.
That's why, very early in our missile programs as pushing a leading edge of technology, we moved to solid fuel missiles, early on just for that fact, because liquid fuel is extremely dangerous.
This was the true instant of the testing: if he had planted the hooks correctly at the leading edge of a ring segment, opening the segment, the worm would not roll down and crush him.