This wasn't a sli-up originally.. It became a slip-up when part of that scene hit the cutting room floor. When the movie was out in the theaters, Kevin threw 3 bricks.... Now, when Home Alone 2 airs on television, he only throws one... It's a shame too cause that was one of the funniest scenes (IMHO). I haven't seen the video, so I don't know how many he throws in it. Charlie
I was assistant post production editor for Home Alone 2 and you're right, there were originally 3 bricks, I didn't play a part in editing it for the television or video, but the first brick has been cut out, meaning there seems to already be a mark on his head before the first brick is thrown.
In the video of Home Alone 2, this was not a slip-up. There were 4 bricks, not 3, thrown by Kevin. Kevin did, however, throw 3 bricks at Harry, but they hit Marv. They did show the first brick thrown because I remember Harry holding up fingers to test Marv's vision.