Conjectures
Almost instantly, the neighbors started talking out loud to one another about what they thought it might be and what they thought it might be. It’s possible that it was just smoke or vapor of some kind. Maybe some residue that was left over after cleaning? There is a chance that they were working on something, but there is no justification for concealing this information.
generated hypotheses based on previously existing theories. Some individuals asserted that the couple grilled meat in their garage so that no one could see them doing what they were doing while they were doing it. Others asserted that the institution was hiding some kind of odd research that was being conducted behind the doors of the building.