Palms have teeth! Different types of palms have different types of teeth, but all those teeth hurt! Big palm fronds that die back have to be removed with a chainsaw, then you can drag the frond away. By the teeth.
Also, let me just say two words: Spanish Dagger. This is the name of a plant, a type of yucca. It was taller than me, and every “leaf” was tipped with a 1.5″ long incredibly sharp needle. Yes, like daggers. The strap-like leaves covered the multiple stems from top to bottom. We had to remove this, too. Oh, and paper wasps had built a nest inside it, which we didn’t know until removal was underway.