Interestingly enough the Underground has more then just spikes, they bought some, well around a hundred anti-personnel mines; the kind that launch out spikes, shrapnel and the like... relatively cheap. If google is correct then I mean the bounding and fragmentation ones to also deter scientist pets as well as just the Vlad the Impaler type spikes... they really hate uninvited guests don't they? So Willa is climbing off a platform into the dark minefield?
That platform isn't stopping either, at it's top speed of say 40 miles an hour, around one hundred anti-personnel landmines spread across a tunnel in naturally pitch darkness to Alaska, a very long journey.
Then again they're cheap, thus they'd probably find a nice, warm rock to be a leg or they might be easily noticeable/unstable with blinking lights and really shoddy craftsmanship. In addition there are artificial lights that are designed to act as markers for Underground platforms. I'm a git for certain but I must give a large hope of escape for a better show.
Notice: I added a bit more in detail with editing.