VIDEO - Fire crews in DeKalb County are investigating what caused a massive fire at the Avondale Forest Apartments that displaced dozens of families. The two alarm fire in Decatur damaged more than twenty units one week ago. "We never know from shift to shift what we're going to end up with so it pays for us to be ready," said Eric Jackson with Dekalb County Fire. Captain Eric Jackson said the blaze jumped the fire wall in one of the buildings and nearly took the lives of one family trapped on the third floor. A helmet camera captured the heroic rescue and shows firefighters tossing and catching children that were trapped on a balcony. "Initially their first thought is to put water on the fire that is until they hear screams coming from the balcony," said Jackson.