Yes, I have. In my case, the 2.5 inch die (very heavy for a Studio) was slipping out of my hand and I grasped it to stop it falling. My wrist pushed on the blade and I was cut. We must be careful with our toys.
I learned my lesson. When it slipped out of my hand a second time, it was allowed to fall on my foot. I was expecting PAIN so I screamed in advance...and no pain. Or my neuropathy didn't let me feel it!
So far, no blades have popped out.