Especially with Alistair blinking spots out of his eyes from the flare gun. He's going by sound more than sight as he dodges around the spider's thrashing legs. If the shriek goes from "deafening" to "no, really, my ears are going to explode any second now," that means he's getting close to the body, right?

One leg kicks him in the shoulder. He winces, stumbles back, then charges forward, fumbling to get the dagger back out of its sheath.

Through the black dots swirling through his line of vision, he sees the light of the flare refracting off eight shiny, half-gouged spheres.

With a final roar, Alistair lunges, driving the dagger into the spider's face all the way to the hilt.