As a matter of fact, this has happened before.
5 seconds sound clip from the Home Alone 2: Lost in New York movie soundboard.
You can hear this line at 00:21:44 in the Blu-ray version of the movie.
Quote context
[...]
- When did you notice he was missing?
- When we picked up our baggage here.
- Has the boy ever run away from home?
- No.
- Has he ever been in a situation where he's been on his own?
- As a matter of fact, this has happened before.
- It's becoming sort of a McCallister family travel tradition.
- Funnily enough, we never lose our luggage.
- He was left at home by accident last year.
- Yeah, that's what my wife meant when she said it's becoming a McCallister family travel tradition.
[...]
Sound clips of the best lines, quotes and sound effects from the movie Home Alone 2: Lost in New York, as rated by movie-sounds.org's visitors.
Actors: Macaulay Culkin (Kevin McCallister), Joe Pesci (Harry), Daniel Stern (Marv)
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