This video is two days old - which in Internet speak would normally put it past its expiration date already - but it made my jaw drop, and then put a giant smile on my face.

距离如下的视频的拍摄日期已经过去几天——按现在互联网的说法，已经过了有效期了——但是看得我都傻了，目瞪口呆，看完放声大笑。

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Then, is how to do a proper glissando, do I need to move my jaw inward/outward to do a glissando?

然后就是怎样正确的演奏滑音，我需要将嘴唇内外移动来制造这个效果吗？

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THEN the scroll appeared and that blew me away … but not as much as the globe (my jaw was literally hitting the floor)

然后画卷出现，让我震惊… … 但还不及地球模型让我震撼（我的下巴掉到地上）

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