Engineer exploit:
Prereqs.
-Engineer must be in your build radius
-Must have a two build sources(MCV + Crane works fine)
-Have two power plants ready to place
1. Select an Engineer
2. Click the building you want to capture(so the engineer starts running towards it, (building must be visible))
3. Place the first power plant directly on top of the engineer.
4. Place the second power plant directly on top of the engineer.
Done, as soon as you place the second power plant the engineer will vanish and you will have captured the building the engineer was heading towards.