Clunk Under Floor During Hard Turns?

[Sundown94]

Hi Everyone!
For the first time ever, tonight on the way home from work I started to feel a clunk through the floor of my 2003 H2 when I make hard left or right turns. It almost seems like something is loose under the truck because if I make a right turn and feel the clunk, it won't happen again during a right turn until AFTER I make a hard left turn (and feel the clunk on the left turn). So it is like when I turn hard left, something slides to the right of the vehicle and then when I turn hard right, it slides back to the left. I can't be positive about what is really going on under the truck, but what I do know is that I can easily feel it through the floor and into my foot (especially my left foot when it is resting flat on the floor in front of the seat while I'm driving). Unfortunately it is also raining heavily tonight (and it is dark), so I am unable to crawl under the truck until tomorrow. In the meantime, does anyone have any ideas on what is clunking -- or thunking or whatedver you want to call it -- under my H2???

Thanks!
Sun-