Flash backs!

I have the sewing machine all ready to do to hem up some jeans, and while testing out a new stitch, the needle comes loose. All I can see if/feel is that needle going through my eye, like it did way back in the day of my middle school years. Thankfully it didn't happen this time, I caught it, an fixed the problem, but talk about scaring me! I finished up the sewing, but had that "fear" in my throat that something was going to happen!