Hi there !

Sheldon suffered with problem of "need of closure" since ever and he wont get over a thing until he finishes it completely for example he wont stop knocking on door before hitting the count to 3 times. Amy, his girlfriend and a neuroscientist by profession decided to help him overcome his problem. She came up with series of excercise which would help Sheldon to realize that the world wont stop even if he let some thing go away without finishing it. 

It seemwd she did pretty well and Sheldon did make quite improvement in his behavior as the excercises went on BUT only until she left his apartment 😅

What happened next, watch the clip to find out 😉