Continue.

It's a short ride that ends painfully. You slam hard into another vent cover. You groaned and rub the side of your head and feel warm blood running down the side of your head. You quickly find the gash and curse in a mixture of pain and frustration. In it, you kick the vent cover off and slide into another stairwell. You sigh and check your options.
There's only up and down bub.
* Up.
* Down.