Ceiling_CrushRaiseAndStayA
From ZDoom Wiki
195:Ceiling_CrushRaiseAndStayA (tag, dspeed, uspeed, crush [,crushmode])
tag: Tag of affected sector dspeed: How quickly the ceiling moves down uspeed: How quickly the ceiling moves back up crush: Amount of damage to apply crushmode: Sets the crushing mode (development version only)
Usage
Lowers the ceiling of the affected and applies crushing damage to anything underneath it, then raises the ceiling back up to its original height. If tag is 0, then the sector on the line's back side is used.
Examples
As the ceiling specials are fairly trivial, examples of every one can be found in the example wad, Squash. This wad runs on Map01 of Doom2.

