The closing walls of doom

Elastigirl whirled her head around 3 times while standing still and stretched her head up to the ceiling but she couldn't detect any openings or ways out. It was not even obvious where air was coming from! She stretched her arms and legs out to brace herself against the remorselessly slowly closing pair of walls but she wasn't strong enough to halt or even slow the progress. The only flaws in the slowly closing silver box she found herself in were the pair of dents in the left wall.

While keeping her hands and feet occupied in a futile attempt to slow the crushing doom of the walls, she stretched her neck out to look more closely at the dents. They were two joined conical indentations, tapering to a point. She tried to think what they reminded her of, and looked down at herself, briefly noticing her own small boobs, absently wondering briefly why she routinely sported them this size when she could have any size or style she wanted and ... oh for goodness sake! That's what the dents were. It was as if some huge woman had slammed into the wall and left dents where her tits had smacked into the metal!

The walls continued to grind closer together and now they were less than 6 feet apart. At this rate, she only had seconds left to act.