You can break them by letting the cups smack against your head or even blowing on them too hard. The mylar diaphragm may be so thin you can see through it but it is still very resistive to air, otherwise it wouldn't be much use as a diaphragm and as it is connected all around it's perimeter to the baffle it creates a sealed system. So be careful out there folks.
I've spent the last five hours listening to music through my system and I think the Arya Stealth is a very close to perfect match as far as my ears can tell, with the HoloAudio Cyan II R2R NOS DAC and the Violectric V222 amp. The holographic soundstage, detail and natural timbre of the DAC and the slight warmth and powerful bass of the amp are passed along really well resulting in a great sounding pair of headphones.
I saw one of you added 3yr insurance to the Arya so I just went into my account and did the same - it's all well and good playing the reliability lottery with HiFiMAN but I think £55 is worth three years peace of mind.