Can we hear the MR
thwup-thwup-thwup-thwup-thwup--thwup---thwup-----thwup------thwupp--------thwuppp---------thwuppp*---...
running quite nicely in sync with the horn? If so, it's very lucky that they didn't clap goodbye at around 24s and 28s, imo.
[*Apologies if this is not spelt correctly.]