It must be Pearl Jelly cuz Pearl Jam don't shake like that. There are these subcultural "conformity mindsets" which sometimes spread like viral wildfire in which people decide to share the same opinions about stuff. It's just a thing that happens.
yeah Jeph, everything you say is true. but there's some good songs on Music From The Elder and Creatures of the Night is pretty good (though Ace isn't on it). Eric Carr gave the band a jolt, and arguably the best live lineup was Gene, Paul, Ace, and Eric.