I suspect this another example of natural frequency. A vibration that is in tune with the time it takes an object to vibrate makes the vibration bigger and bigger every cycle until something breaks. The Tocoma Narrows Bridge (galloping gurdy!) was a famous example. The same phenomenon is delibertly used to tune in stations on a radio.Good construction Engineering keeps this in mind and builds in appropriate dampening.
I suspect this another example of natural frequency. A vibration that is in tune with the time it takes an object to vibrate makes the vibration bigger and bigger every cycle until something breaks.Didn't that happen to the Golden Gate bridge when there was a crowd walking across it?