This is my first post to the Forums, and I have only had my phone for a couple of days (I've never had a smartphone before either), so please bear with me if I sound completely ignorant. 
I just got my HTC Droid Incredible over the weekend and I have fallen in love with it! I had no problems until just a few minutes ago. I went to answer a call, but accidentally hit the button to end the call. I just hit the "phone" button to get back into the phone dialer where I could call them back. At this point my screen just went black, and eventually brought up a little red triangle with a red exclamation point on the screen. I kept trying to turn it on but nothing would happen, so I took the battery out, put it back in, and turned it back on. It turned back on, but it brought up a screen that had a little picture of a Droid character and it had several menu options (One of them was recovery, can't remember what the other ones were). I kept hitting the volume up and power button and finally the phone turned back on, and now it seems as if everything is fine with it. Does anyone have any idea why it would do that, and what menu option I could have selected? I am afraid I did something that will mess up the phone.
Thank you in advance for your help!