what interesting behaviour have you witnessed during investigating?

Question: what interesting behaviour have you witnessed during investigating?
- Keywords:
  behaviour,
  investigating,
  witness
Asked by TF1256 to Andy on 9 Mar 2017.
- Andrew Jones answered on 9 Mar 2017:
  
  I like to see how drunk people do difficult tasks on computers (usually very badly!)

Question: what interesting behaviour have you witnessed during investigating?