Meaning of トルネル is actually misspelling of トンネル?


I need to know what トルネル means in the following sentence from a manga I'm
reading (slashes are where the line-breaks are):

この **トルネル** から ／ 出る！

The katakana is throwing me off. Is it one or two words? Is it a Japanese word
that's written in katakana for emphasis? Is it a foreign word? Is it
misspelled?

For context purposes, I've added the previous sentence in parentheses here:

（この人が言うことは ／ 無茶ばかりだけど） この **トルネル** から ／ 出る！

Below, I've added a photo of the page where the text comes from. It's to the
left of the binding superimposed on top of the girl blushing.

[![enter image description
here](https://i.stack.imgur.com/QM7Gm.gif)](https://i.stack.imgur.com/QM7Gm.gif)

