I have a Makerbot Relicator 2x and have encountered an issue that I need to fix.

I irresponsibly left it unattended for ~1hr and when I returned, I found that the filament had not left the extruder properly and is now firmly attached to the extruder. Has anyone ever encountered this before and know of a way to remedy the situation?

Thanks in advance

Picture for reference:
IMG_20150611_085820.jpg