Dd has episodes of night terrors every now and again, and from what you describe, it sounds the same. For dd, I find the triggers are being overtired (she almost always has a few nights of night terrors when she is ill and not sleeping well) and overstimulated, particularly in the hour or two before bed.
I found that I couldn't leave her in her crib as she was so violent, she was seriously in danger of hurting herself. So my dh or I would hold her, but we would do our best NOT to engage her (ie, talk to her, ask what's wrong, etc). Her spells would last ~30min, and when they ended, she had no idea she had been so upset. She often wanted to take a tour of the house (we always turned out all the lights so she wouldn't realize we hadn't gone to bed yet), presumably to make sure all was well, but then would be back to bed without too much difficulty.