For the famous blood geyser scene, the film makers shot the sequence by turning the entire room upside-down on a gyro set and attaching the camera so that it looked like the room was right side up, then they poured gallons of red water into the room. (The normal movie blood wasn't able to create the right effect for the geyser.)
The spinning room turned incorrectly and caused a premature flood of "blood." According to the DVD commentary, the people pouring the "blood" were shocked when the wires were hit with the water and the room began to spin out of control. Wes Craven remarks that it was like the Ferris Wheel from hell. The power on the set went out and Craven said they were all in the dark and covered in blood.
Depp also makes a cameo in Freddy's Dead: The Final Nightmare
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