1.   A moment later, we felt the concussion.

2.   After one loud explosion, we felt the concussion.

3.   He felt the concussions of two explosions and sent two colleagues to lower the rods by hand.

4.   Within seconds, they said, Butler and Kimmel felt the concussion of the crash.

5.   You could feel the concussion.

6.   Officials inside the Kremlin said they could feel the concussion from the blast.