We shouldn't have tried to push to the basement; it wasn't long before we became surrounded. Fortunately Nathan was able to toss a grenade down the steps to the basement, where all of the shadows seemed to be coming from. I was surprised the floor didn't give way when it went off, but my relief soon gave way to fear; something big was coming.
We all began to retreat from this beast. For my part I unloaded my carbine and Red's Stechkin APS into it, but even after 50 rounds it didn't even slow.
No two ways about it, we were in over our heads.