Falling beneath floor of bg

[darude11]

Hi there, I am working on one of my characters and wanted to ask, while he is in planning phase, whether this kind of move is even possible:

Character does spell to make hole in ground, through which most characters, which step on it, fall. The hole won't be permanent. People, which fall through it, will spawn in the sky falling in short distance next to hole.
OR
Character makes temporary slowsand pit in ground, characters, which step on it will slowly sink in it. If there are some sinking when the pit disappears, they will be thrown into sky.

It seems impossible to me so far, but I need to make sure, whether it really is, first.

[YinYin]

You can make the hole catch a single character (itr kind 3) and slowly move him down+ send and release him high up via cpoint.