It is possible for a chassis to break the tube. The line output transistor (horizontal output transistor depending where you live) not only drives the scan left-to-right deflection, it also via the Line output transformer (LOPT, horizontal output transformer) derives the EHT voltage for the tube.
The waveform on the transistor requires tuning, so you'll find 1 or 2 capacitors across it, generally around 8200 pf or thereabouts. If the capacitor falls off or goes open-circuit, the transistor will pass high-voltage narrow peaks through the LOPT, resulting in the EHT rising to crazy values. This can cause a spark to jump from the internal coating, through the glass to the scan coils (yoke), puncturing the glass and admitting the air. The hole itself will usually be star-shaped, but a particularly violent activity could cause an implosion of the tube.
The EHT spark that hit the yoke can then run amok, blowing up ICs and other parts all over the place - something like getting hit by lightning.
As you can imagine, the time taken to track down and replace all the broken bits can cost a lot of money to repair. Then the new tube needs alignment of the yoke and magnets for purity, which takes even more time.
The last generation of CRT TV sets had protection against just this sort of thing happening, shutting down if a fault was detected and hopefully saving your precious tube.
Of course, faulty badly-made tubes do exist and the neck is the most likely place to break.