...to tell MNHQ it's the *goats* that trip-trap over the bridge...

[RustyBear]

The trolls lurk underneath....

www.mumsnet.com/Talk/am_i_being_unreasonable/2869213-To-not-understand-why-people-find-dieting-so-difficult

YABU. It's just a reference to the story surely? Making reference to the fact that there is a troll under the bridge the goats are trip-trapping over?

YABU I knew what they meant.
However mumsnet made me giggle with that one

I read this too....

.....or perhaps the troll was on the bridge running after the goats?