Car leak in my mazda

[asilvatx]

Help!

I noticed a funny musty smell in the back of my car a couple of days ago, but just thought I might have left food. After searching high and low, I found not leftover rotting food, but the floorboard of the passenger side back seat was soaking wet and the water was working its way towards the front side of the passenger seat!

I checked all the windows, but nothing was left open and i figured if the water came from the window, then the seat would have been wet as well. A friend suggested I check the trunk since the water leak could also come from there. Checked, no water in the trunk.

I do recall not long before the mustly smell, I was entering the freeway, with a large trailer truck in front of me, when I suddenly drove over a regular car tire in the middle of the freeway. The tire was just the tire itself, so rim or anything else attached. I pulled over to survey any damage and there was none that I could see. However, when I ran over the tire, my small car did jump so high off the ground that it the windshield wiper on the passenger side of the car jumped on its own.

We have had rain everyday for the last two weeks, so I know this water is truly just rain, but I have no idea where this leak is coming from.

Any ideas???