I was browsing the ZDoom forums when I saw people adamantly stating that you could never make anything like the gravity gun in ZDoom. So I made one.
It works more or less just like the HL2 gravity gun. "Pick up / drop" defaults to E and "shoot" is bound to "R" although you can change it in the options.
Credits:
The ZDoom forums for "inspiring" me. And anti-credits to Randy Heit for not making thrustthing() work on any object you want ;_;