The mouth of the tunnel was a white hole when he turned back to face it.
A white hole is a thing that has been recently discovered in the field of astronomy.
If you add any matter to the area, the white hole disappears.
However, it is very unlikely that white holes can form for a long amount of time.
Call it by any other name, he still wanted to go looking for a white hole.
Try to promote the car on top of a white hole is dug from the idea.
Consider next what happens in the case of a white hole.
In short, we still have no direct evidence that white holes exist.
Could it be that the Universe's first white holes have yet to form?
We look around for white holes and can find none.