A wee Button

Angus Broom of Glasgow comes to the little lady of the house exclaiming, "Maggie, cud ya be sewin on a wee button that's come off of me fly? I canna button me pants."
"Oh Angus ... I've got me hands in the dishpan, go up the stairs and see if Mrs. MacDonald could be helpin ya with it."
About 5 minutes later there's a terrible crash, a bang, a bit of yelling and the sound of a body falling doon the stairs.
Walking back in the door with a blackened eye and a y nose comes Angus.
The little lady looks at him and says, "My god, what happened to ya?? Did you ask her like I told you?"
"Aye," says Angus. "I asked her to sew on the wee button an she did. Everything was goin fine, but when she bent doon to bite off the wee thread, Mr. MacDonald walked in.