Mmario, the shaking is just the fear rolling off, because you have contradicted the paralysis fear can create. The kind of shakes you are describing are fear's equivalent to grief's tears. The more you can allow them to keep rolling, the sooner you will be done with stagefright. One way to heighten the effect of those shakes is to loudly and gleefully emote, at the same time as they are rolling, with such phrases as "YeeHAH!"

~S~