Welcome to day 2 of IrishCentral's Christmas Advent Calendar! 

We're counting down to Christmas, and in lieu of chocolates, we're giving you our favorite Christmas videos of all time. 

Day 2 is a testament to the time-honed fact that is is just not Christmas without a good Irish mammy prank, and this is one of the funniest ones ever. 

Mary Brogan, an Irish mammy from County Mayo, had a devious trick played on her a few Christmases ago when her daughters made it look like their dog had devoured the Christmas ham she had lovingly prepared. 

Her reaction is priceless!

Advent Calendar Day 2 iStock