Mythbusters and Null Hypotheses

One of the funniest episodes of the Mythbusters is also one that is full of different experiments and hypothesis testing examples. Adam and Jaime try 4 different techniques for sobering up and make conclusions either busted (i.e., fail to reject the null) or plausible (i.e., reject the null) about each. Do you agree with their conclusions? Which ones do you agree with? Why do you agree or disagree?

part 1: https://www.youtube.com/watch?v=T6-qEaJssdM&feature=youtu.be&ab_channel=Trustme77

part 2: https://www.youtube.com/watch?v=9mmJMIwsaDQ&feature=youtu.be&ab_channel=Trustme77