Vibrating Cockroach of Awfulness (VCA)

VCAs can be found in any terrain and under almost any circumstances. And regrettably, they can fly. Their vibrations initially are harmless, but if allowed to continue for over 6 minutes (i.e. 360 seconds), everything just starts to feel awful. Scientists are so far not able to explain it. Examples of the awfulness:
[1] If you are baking a cake and a VCA is undetected in the area, the cake will taste awful.
[2] If you go to the hairdresser and a VCA is in the vicinity, your hair will look awful.
[3] If you’re singing in a concert and VCA is somewhere in the room, you will sound awful.