If you've met me in person, you know I'm quite the gesticulator when I speak. And I also have a strange tendency — which my brother has as well, so I can only imagine it's something we developed as children — to make sound effects to accompany my actions. For example, if you and I are walking towards each other in a narrow hallway, and I skirt to the side to avoid a collision, I will also utter, "yurreeek," or some sound to approximate a skid and/or close call.
While in Paris, I added a whistle to my communication style to indicate something that I didn't have the vocabulary to express in French. For example, I'd be saying, "And then I went…" and with my hand I'll make an up-and-down-and-over-the-hill motion, and I'd make a long whistle sound to accompany it. Or if I wanted to say, "He had to go," I'd simply say, "He" and then shoot my hand out to the right and make a short whistle sound.
While this was very effective in making myself understood when French failed me, I've discovered it's permeated my English interactions as well! So now I'm eeking and whistling not matter who I'm talking to or what I'm saying. Truly I'm becoming a human beat box. Or a crazy lunatic. You decide.