I posted a question about this a while ago, referencing the same youtube video. The reason I'm not convinced this is where it was sampled from, is that I had this game back in the day and believe me, the gameplay was not only terrible, but impossibly hard! As far as I know, you have to complete the game to get that laugh sample, and I don't recall there was an SFX test screen on the game menu. This game was so difficult, there were probably only a handful of people in the country who actually had the patience to complete it back in the day. It would be weird that one of those people also happened to be making tunes! Unless there was a cracked version doing the rounds which had a cheat mode, or gave access to the SFX? My suspicion is that it's from a film, but I could be wrong.