Like good citizens of the world, we recycle, so here goes:

The PhD student was in the lab, stirring an unpromising-looking dark-coloured slurry in a beaker when the supervisor checked up on him.

Supervisor: What's this?

Student: It's my MIP, professor.

Supervisor: That's your MIP? It looks like mud!

Student: But professor, I don't understand, it was only ground this morning!

Boom! Boom!