Temporal trend of Supervisor's behavior with PhD Student

There are lots of talks about graduate school and advisers. Some of them are funny but true. Have a look at following animated pictures and don't forget to leave comment.

At the time of joining,

Be good, you will be fine......

After a year...
Must Work Hard boy

After three year...
Must Work very hard you know!

After four year.....
Can you hear me, you must work hard!!!

I would like to thank him/her for this work. (This is not my work. I got it in email and just wanted to share it.)