32 minute IPA showed me the need for multiple rackings

Hello everyone, I just racked my 32 Minute IPA this morning. I have made 7 or 8 batches of beer in the past, but have never seen lees like this before. When I opened the primary fermenter after it had been racked, I had what looked like a 3in tall circular cake that was all lees, yuck (smelled great though!!!). The wort looked promising and look forward to the updates. Kegerator will be in stalled next weekend.

What is "lees"?

Lees:
the detritus of fermentation, consisting of dead yeast and fruit debris

http://en.wikipedia.org/wiki/Lees_(fermentation)