I wonder if this is the same problem I had? I hope so as it would suggest a system problem rather than just my trainer - still need to identify the cause of the noise and vibration though
I have music blaring out so I couldn't tell you whether mine was noisy or not Bridgy.. it has happened once before a few week back where it was just like cycling through sand - same again last night.
Hope it is a glitch for you (and me)... if it happened again I will definitely get off and re-boot.