Metal Gear Solid fans are incredibly angry at this pachinko machine

Watch this ad for a Metal Gear Solid 3-themed pachinko machine (a sort of Japanese pinball / slot machine hybrid), and you'd be forgiven for thinking it was just a weird gambling machine with some oddly-excellent MGS cinematics thrown in. There's an over-the-top soundtrack and voiceover, and also this one particular bit where Snake's character wins three cardboard boxes in a row, then three half-watermelons, then three snakes, and then things go absolutely crazy.
However, look at the video