Prototype 2 One handed trick

Wringing out flannel 

Put flannel round tap and twist ends of flannel together
pulling flannel tight or use a small flannel and squeeze it
out with one hand

Verwacht positief: /
Verwacht negatief:/
Onverwacht positief:/
Onverwacht negatief:/

(Bron: http://onlinelibrary.wiley.com/doi/10.1002/9781444323801.app1/pdf)