USB Plug Got Stuck

I can't pull the USB plug from the arduino!
What's going on?

Is there some mechanism to pull it out? Note that this is the first time I'm plugging the USB cable... :blush:
When I plugged it I think I heared a tick sound indicating that it got injected... :astonished:

Please help!! :~

EDIT: Okay, I got it out after a lot of force. Widened the area. To pull it gently one needs to pull and wriggle the plug left and right.