AVP Ultimate Prey 4

Each time it struck the arm, it tore away more of the chitinous shell, spilling more blood onto the floor and eating away at it. Finally, its forearm and hand tore completely loose and fell to the floor. The creature howled an inhuman wail of
pain. A roiling cloud of steam rose from the melting floor. Dean had stopped his pounding and was watching, his strange eyes narrowed. Inside, the creature smashed at the glass barrier with its severed arm. Each time it did, its acid blood etched deepening damage lines into the surface.

"Christ," Brockton said, "it's melting the glass."

"We need to get out of here," April said.

The maimed creature continued its assault on the barrier. Finally, Dean had had enough standing around, and he started pounding the glass again.

"Doctor..." April said, worried.

"Don't worry, that's a graphene and crystal-matrix polymer blend. It should hold. It―"

And the smoky glass exploded outward in a spray of melting pieces. With a shriek, the alien flung itself at Dean. The hunter rushed to meet it, but the alien thrust the stump of its arm at Dean's chest. The hunter screeched as the acid burned a huge, jagged circle into his chest. Dean, though badly wounded now, was still fighting.-pg.40 chpt.1