Abbing off lost horizon, I found part way down that I'd put the belay device on my leg loop. Felt a bit unbalanced, but otherwise OK. But I felt very lucky that the leg loop held. I did have a prussik on, which might have held, had the leg loop gone, but I don't really recommend this as a way of descending.
No excuse, I normally check ABC Anchor Belay Carabiner as my ab mantra, but still managed this numpty mistake. Not spotted by the people with me either. Let's all check ourselves and our buddies more closely.....
Trad rock climbing
Abseil or rappel failure or error
Rescue Services Involved?