I can confirm that smashing them against door frames is not recommended. I’ve had my PAM005 since 2007 and have woken up drunk to a non working watch and a bill of £400+ and again smashed it against a door frame and flattened the crown guard. That bill was close to £600,
Still mine was a wedding present bought off Paneristi.com from a guy in the US back when it was $2 :£1.
I can’t complain