Looking at the picture from inside the cabin, the overhead bins may have popped open on impact and spilled their carryons.
“Looking at the picture from inside the cabin, the overhead bins may have popped open on impact and spilled their carryons.”
This sounds like a pretty logical thought. If the bags fell out of the bins you might have needed to pick them up anyhow to unblock the aisle. Instead of placing them in the seats it might have been easier to evacuate the plane by holding on to them as you left the plane instead of maybe re-blocking the aisle.