I was waiting in the Virgin Clubhouse at NRT to catch VS901 back to LHR when I suddenly noticed the inbound aircraft do a go-around and then saw the runway was geared up for an emergency landing. When I boarded I asked the cabin crew out of curiousity and was firstly told a story about ice dropping out of the landing gear into fishing boats and this having something to do with flying over Siberia. This intrigued me as I am usually on a long haul flight 2 or 3 times a month and this was certainly the most novel explanation I'd heard for a flight delay! However later when speaking to another FA he said that it was in fact 2 go-arounds and said something about landing gear issues.

Even if you don't know about this particular flight can anyone shed light on the falling ice theory?!