Tsvetomir

Hello everyone. I've got a tattoo for almost 2 years now and i want to get a second one. The thing is that i know the direction i am heading but need your help. I am a spontaneous/ impulsive person and want to get a tattoo (small one) which represents that but i don't know what "symbol" does that. By "symbol" i mean some kind of letter, word in a different language, animal or w/e else that you can think of. Basically anything that represents that the person is spontaneous/ impulsive.