what’s the funniest reaction you have had from someone who thought they were drinking alcohol?

Question: what's the funniest reaction you have had from someone who thought they were drinking alcohol?
- Keywords:
  alcohol,
  funny,
  reaction
Asked by malteaser101 to Andy on 9 Mar 2017.
- Andrew Jones answered on 9 Mar 2017:
  
  People tend to start laughing a lot and apologise for their behaviour!

Question: what's the funniest reaction you have had from someone who thought they were drinking alcohol?