Springboard restart- now stuck with black loading screen

[Cyder]

Downloaded an app Lockslider from Cydia which required a springboard reload. Now my phone is stuck on a black screen with the loading swirl moving. It's been doing this for going on 5 minutes. Any idea how to get out of it? Am I able to shut off and reboot the phone?

I'm currently at work so connecting to a computer is a no go until later tonight.

Edit: Nevermind, held down the home and power button and got it to reboot. I posted to soon before trying this out.