Slipknot / Photo by Helen Pearson

It was a scary Thursday night in New York City.

Nu-metal legends Slipknot and prog-rock heroes Coheed and Cambria rolled into Manhattan's Madison Square Garden with heavy riffs, some serious head-banging, and, of course, Slipknot's totally creepy masks.

The two bands thrashed, they bashed -- and we took pictures! Check them out below:

Slipknot / Photo by Helen Pearson

Slipknot / Photo by Helen Pearson

Coheed and Cambria / Photo by Rebecca Smeyne

Coheed and Cambria / Photo by Rebecca Smeyne

Coheed and Cambria / Photo by Rebecca Smeyne