BOOYA! That's the way I feel about it! Any concert is deafening (Britney, Back Door Boys etc.), but some are just louder than others(Metallica, Korn, etc.)
About the Mantis queue, the speakers are nearly as deafening as the trains roaring by. Or the MF speakers for that matter. Heck, I was going by the speakers when they had Kryptonite and it kicked!