The headrest tend to stick and you won't break anything by pulling on them hard. The only problem I had once was smashing my hand on the roof and putting a dent in it under the headliner... Sometimes it helps to tilt it forward or rearward when pulling.

The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it.

JB Rhinehart, Realist

A-Body's RULE!