In addition to the usual scattering of pennies alllll over the house, she knocked over the kitchen table and chairs, along with some furniture in our bedrooms, and then spilled a pot of coffee in the kitchen, and I'm pretty sure she broke the pot as well...Point being, she truly trashed the house.
This was the last year she did this, mainly because my brothers and I were at the age where we didn't believe in leprechauns, but also because her "pretending" and "make-believing" had the same effect on us that, say, genuine anger and frustration would have had. A morning that was supposed to be cheery and magical turned into a gloomy and annoying one...
We finally left for school, all of us in terrible moods, walking out the back door as my mother continued to pretend to be pissed off. Maybe there were some actual underlying feelings of resentment towards leprechauns. Or us. Or maybe she just didn't want to have to clean up all of that shit... She should be a professional actress.