I've been to some incredible Proms in my time, but I think Barenboim's Die Walkure simply took the biscuit. Here's my review, from the Indy: http://www.independent.co.uk/arts-entertainment/classical/reviews/classical-review-prom-15-die-walkre-daniel-barenboim-berlin-staatskapelle-8729734.html
Above, how the hall looked during the ovation last night (sort of).