How do I go back from the slidescreen that says

[AC Question]

I do not know what I did nor how but my phone was quickly slided to the reboot slide screen than I used the volume down key trying to navigate my way out not know that I was selecting an option from the 3 I saw on the reboot slide, now I'm stuck with a screen that says "apply a adb sideload<filename>" to the device" and I don't know what to do... please help