Studying can be a really hard thing for some people.
Though, the funny thing is that according to some scientists sleeping and studying is not such a bad combination!
In fact, according to medical researches the sleeping brain does receive, process and perhaps even store information presented during sleep. Listening to learning material during sleeping hours has proved to be a highly effective way for people of all ages to realize their full learning potential.
So, maybe the guys on the picture will wake up with some new knowledge in their heads without much effort!