At one of the South London parishes a few years ago there was a pretty horrifying incident of a man coming into the Church and slashing out with a samurai sword. Sometime later the elderly priest who was celebrating the Mass came and wanted to concelebrate. When I suggested he must of been pretty traumatised by the incident he said he wasn't, because he was quite short sighted and thought it was something the parish Liturgy Group had organised, he just carried on saying Mass.
I couldn't help thinking of this story when I saw this video on the Cafeteria. Fortunately the Lit Com here has all read the Pope's Spirit of the Liturgy, and have never raised the issue of liturgical dance, a couple of members did complain about a Gloria our school children sang with a bit of clapping in it, but here it wasn't the clapping it was the lack of an authentic translation. I must say I thought it was a bit odd with Credo III. I do think there is a serious problem with "adult Church" and what children are given as a norm in our schools.