Nico was using Raph's shoulder to hold herself upright through her own attack of mirth.

"He's going to be so pissed when he wakes up," she said, shaking her head back and forth and wiping the tears out of her eyes. Anyone else, she might have worried for their safety in the the face of Eric's vindictiveness, but she was pretty sure at this point that he couldn't throw anything at Cassie that she couldn't either take or take out.