From Valve Developer Community
Burrow
!FGD
- Burrow. If no burrow points within 512 units, does nothing.
BurrowImmediate
!FGD
- Burrow immediate.
Unburrow
!FGD
- Unburrow.
StartHangingFromCeiling
- Start hanging from ceiling.
DropFromCeiling
- Drop if hanging from ceiling.