Physics is fun!

It is a Friday evening. Nobody is at the office or in the library!!
The little fox in my Gmail is having the monkey over for tea and cookies!!!
The chick has gone up one of the seats in the garden! I thought a lot about it but couldn't figure out why!
I am browsing through papers and books to find a bound on the second largest eigenvalue of a continuous-time Markov chain!
Do you know any, by any chance?