Sunroof Drainage?, Sunroof Drain lines? Options

[JoshuaM]

Help!

Yesterday I had my car parked facing up the hill in front of my house when It was raining. When I drove off the gutter to drive back in the driveway, a couple of liters of water suddenly splashed down my back from the roof. I was shocked, and got out of my car to inspect. The sunroof (factory fitted) was closed properly, and none of the interior or roof lining was wet (other than what I saw drop).

I have owned the car for a couple of months now, and I have not had any other trouble with it - but I don't recall it raining when it was parked in that position before.

From my research on the Internet, I thought it might be one of the sunroof drainage hoses. The way the car was parked, any water that got in would have pooled at the back on the driver side (right side over here), which is where the water splashed me from... So I was thinking that drain might be clogged.

I read just to hit that corner with an air compressed, but I do not really know how the drainage system really works, so I was just wondering if anybody had any pics or diagrams of what it looks like up there? Or any other ideas as to what might be happening and how to fix it?

Thank you,
Joshua

Note: Car is a 1997 Celica ZR manual with factory fitted power tilt and slide sunroof.