I just found this to be dull. I mean, it's nothing but this bland animation about a guy going to the bathroom. I don't see how it was about an important mission. Well, lots of things can be important. I especially think it's too short. It needs more variety.
I never understand that expression "when nature calls". It just seems so random. What's with the word Missio? Did you want to make the title unique? It's just odd.