Some people don't know when to quit. Taking that kind of stance can be quite insane or courageous depending on the situation. Here though, in the case of Rainer, it's definitely both!
This bit of fan art of Rainer was created by Dutch on FA, http://www.furaffinity.net/user/dutch, who has a wonderful talent for toon proportions and humor. And check out his Patreon, https://www.patreon.com/Dutchcartoon