Looking at the video,it looks like his bottom lip is above the bottom of the glove and hes pushing into it. The sound appears to be coming from the air being forced past his bottom lip and the glove, the container being an amplifing chamber.
Looking at the video,it looks like his bottom lip is above the bottom of the glove and hes pushing into it. The sound appears to be coming from the air being forced past his bottom lip and the glove, the container being an amplifing chamber.
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