How did I become 'Pam the angry squirrel'?

At my gym, my coach Andrew usually gives his students nicknames or even my gymmates give each other nicknames. There is one time where two filipinos guys decided to wear spats together to No-gi class, which means they don't wear gi over their spats and other students complained about how uncomfortable they were being put in a North South position. So we joked about it and called them Piñoy fun boys for a couple of weeks.

I also got a nickname as well sometimes my coach called me Madame Pam or whatever he came up with. But I actually got 'Pam the angry squirrel' from my teammates, Pavel and Takashi. It was right after my first competition, all my teammates watched me competed and the funniest thing was that I tried to hit and push down the opponent head without knowing how ridiculous I looked at that moment. Takashi told me that in order to take the opponent down, I have to snap and push down their neck so they will lose balance. And I hate taking down, especially in a competition cause when we do sparring at the gym it usually starts from the ground but in a competition you have to start from standing. So the next day I came to the gym, Takashi told me in his japanese accent that "Pam, you looked like a squirrel yesterday," and Pavel added that I looked angry and aggressive as well. Both of them decided to call me 'Pam the angry squirrel' ever since.