1.   His mouth dropped open when he saw me standing in front of him, carrying a gun.

2.   And my mouth dropped open.

3.   And in the back left corner of the gallery, where relatives and friends of the victims sit as tightly as a group hug, mouths drop open.

4.   As she read a tattered will, her mouth dropped.

5.   Her mouth dropped open in comic shock.

6.   He was brilliant and my mouth literally dropped open.

7.   His mouth dropped.

8.   My mouth dropped open in disbelief.

9.   My mouth just dropped.

10.   She sat right down next to the husband and watched both their mouths drop.