I had to bail from the ztr for the first (and hopefully last) time today. I have a customer who had their hill regraded and hydroseeded 4 weeks ago. The hill was steep but mowable before the regrading and is less steep now, so I figured mowing would be easier. I mowed 1/2 the hill sideways when I started to slip a bit, so I figured I'd mow the rest driving up and backing down (I know--not the best idea, but I'm lazy). I was driving up my 4th or 5th pass when the wheels started to slip a bit. Next thing I know, I'm facing downhill sliding out of control towards a bank that leads into a stream. I jumped off about 3 feet from the bank and the mower shut off and stopped 1/2 way over the bank. As I was wondering how I was going to get the mower out of there, I notice that gas is pouring from both tanks since they were full and the mower is sitting at a 45 degree angle. Using the e-brake, I was able to ease the mower down to the edge of the stream where it was flat, and then found a less steep spot on the bank where I could drive out. The mower and I escaped unharmed. Now let me say that the grass was wet, but I was able to mow the established grass next to the hydroseeded area with no problem. I finished the hydroseeded area with the push mower, but fell down 5 times doing so. It was as if the hydroseed had been sprayed with oil. Anyone else have experience like this with hydroseeded grass?