Well, it's funny you should point that out, because internally I keep accidentally referring to the boggarts in Household as 'brownies'. Because that's what they more closely resemble to me in the way they are portrayed.
Though, funnily enough, in folklore, brownies can turn into boggarts when sufficiently angered so... *shrugs*
Yeah the ‘Going Juggernaut’ idea is definitely a part of that folklore of the ordinarily handy and peaceful house helper turning into a violent creature.
I was actually re-reading through the Household PDF and found this:
"Those who secured a Contract with the Hearth and swore their fidelity to the Master, took the name of Broonies, and went on to become the modern Boggarts.