[SudoEpoch]

Helium will also cause it to stop working

[wereHamster]

Helium will make the iPhone gyro stop working for a few days.

[Redoubts]

Almost forgot how cool MEMS are

[baq]

the whole thing, actually, not just the gyro. the clock is nanomechanical and helium breaks it, apparently. the newer models have a version that fixed that particular problem. it was in the fine print in the manual somewhere.