Apparently, yes. Yes, it did.

You heard it here first, ladies and gentlemen (unless you already saw Chelsea Hassler's tweet): this happened. Bill Murray dropped by The Last Word with Lawrence O'Donnell tonight in every sense of the word. Not only did he wipe out in the most charming fashion possible right before the commercial break (he was fine, he came right back after commercials), even his introduction was in classic Murray cameo fashion:

In conclusion, ladies and gentlemen, this happened.

Sources: Chelsea Hassler