There was some sort of wet stripe going down the right side of the lane on a street by my house today. It goes for about 4 blocks. I thought it was water from the storms last night, maybe leaking out of a truck bed or something, but it turns out it was some sort of grease/oil. I was getting close to my street to turn off rolling about 10-15 MPH, and I gently let out the clutch and my rear tire let loose. I rode out the slide, got out of the greasy spot & tried to ease on the the brakes and started to slide again-the stuff must've got on my rear tire. I know I wasn't going very fast but no one wants 450 pounds of hot scalding metal on top of them. I guess if it was on the highway I would've been in some real trouble.