The broken concrete blocks are precariously placed and there are concerns for rescue workers as well.

BBC: Dhaka collapse: Rescue operation's search for survivors

The bubble-heads have set up 35 labs where they woo prospects with demonstrations of packages being dropped on concrete floors, vibrated as if they were on the back of a truck driving over cobblestones or placed in vacuum chambers to see how the bubbles respond to altitude.

FORBES: Magazine Article