I wondered if that might be it. We used to have several in our backyard but I've replaced them with some shrubs now. I still have one that I cut down every couple of years but it keeps growing back. It's different from the others, it has nasty needles at the end of each leaf spike. It's close to the pool and when it gets large it will give me a "shot" in the rear when I bend over to clean the filter basket - that is why I cut it down every couple of years. I think it's specifically called an Adam's Needle Yucca or something like that. In fact, I've thrown the cut ones out into the woods and they've taken hold and are growing there. Bizarre will to live on that plant!