I can't now remember the name of the David Hare play about the UK train crashes, but I walked out of it with sympathy only for the government and train companies, and very little for the survivors and bereaved. One would think this would be difficult to achieve.

I can rant about the awfulness of this play more or less forever. I would have walked out at the interval if there had been one, and I remain convinced that that's why there wasn't one.