I've had an adult Boa and Carpet Python completely bow out the 1/4 " plastic doors and escape.
I've also had the same Boa and a different Carpet completely blow the doors out of the tracks!
For this reason I am anti-plastic sliding doors for big snakes! I plan on replacing with glass doors.
This is another reason I REALLY like my one Boaphile cage with drop down doors and heavy duty latches. Too bad their size selection is more limited than AP's.
also
When I'm in another room watching TV or doing something and I hear noises in another room, I now go and inspect since it may be more than the regular snake noises.