Alistair,
My reflection just blinked. Do I do something?
Backwards in NH
Backwards,
Your mirror is apparently suffering some latency. Try covering the mirror in a heavy cloth, waiting several seconds and then uncovering it. If the problem persists, try operating it in better light. If the latency remains, dispose of the mirror in a safe, hazard-free way (avoiding breaking it at all costs, for obvious reasons) and purchase a new one.
Alistair