Games within Excel

Not a strange geeky exercise or easter egg hunt, but a question about some games I got (Sonic, Tetris, Pacman) in flash format within an excel file.

How come they’re in an excel file? Is it to merely hide a game or does excel do something that lets a flash game hide within?

Great minds think alike How did they do this? Flashed based game in Excel spreadsheet - Factual Questions - Straight Dope Message Board