Well this certainly complicates things.

Surprised the ground did not start to collapse into a singularity.

Oh my, a quartet of armored carriers, stuck in a hole. Time to tie some F6Fs together and airlift them out one by one.

I would hate to be Formidable....under the crushing weight of her three sisters.

Oh wow, not even a tree can withstand the weight, and this is saying trees root insanely deep

Well there’s 4 in the hole now… someone get me a firehose, we’re gonna float them out

Poor Unicorn, what will she do? Then again, seeing how buff U-Chan can get, maybe he can do something!

If they were being smart, they would get out of the hole before trying to pull Formi...

First she ripped the tree out of the ground and then cleanly split the tree. XD

1st page of the series is tagged Dig Dug. If that's actually relevant then their choosing to keep going down the same hole means they deserve this situation.