Mold

Ingredients for removing mold from your basement ceiling (x2):

1. masks
2. large flat scrub brush + small brush on handle
3. bucket
4. hose + water source
5. open window
6. removable fan venting out
7. ladder
8. space suit (with hood)
9. mold remover spray (lotsa bottles)
10. goggles
11. plastic bag shoes
12. duct tape
13. large sheet of plastic to cover doorway and any openings to other rooms, including HVAC openings in basement
14. Mr. Clean rubber gloves, preferably in orange
15. radio (for sanity)
16. work lights
    
17. and if your basement is moist, probably a dehumidifier for afterwards.

Also, if you are smarter than we are, you would have:

1. goggle wipes and windex
2. super-long extension cord
3. shop vac