Watch: Two Guys Beatbox With Sulfur Hexafluoride — GeekTyrant
توییتر \ cait ⍟ ✪ در توییتر: «How helium makes your voice go high, inhaling something denser than air like sulfur hexafluoride makes your voice lower and I'm SCREAMING https://t.co/FLwikWyaw3»
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