Making Sajdah

"I have two questions. The first concerning sajdah. Do knees touch "the ground first, or do hands? I remember someone quoting a hadith "about not making sajdah like a camel. What does this mean?

The only school that says hands first to my knowledge is the Hanbalis. I saw this in Ibn al-Jawzi's book of comparative fiqh "al-tahqiq fi ahadith al-khilaf." I don't know the hadith quoted, but when the camel sits, his front two knees are first to touch the ground, then the hind knees.