Expedite (2nd Draft)

The walls around me are polished rock, the scintillating colors of minerals interrupted only by the rusting steel bars that held up the tunnel. My dog Sunny, a petite Golden Retriever, licks my hand and weaves around me. I take a few steps farther than the last time. I glance back to make sure no one followed us and hold up a fist. Sunny sits and tilts her head. I latch my helmet into place, the air tank gasping as the bottom of my helmet seals with the collar at my neck. I go through the door; Sunny waits behind.