He banged his fist on the table.

Bats are mammals, just like us.

Be sure to fill in the blanks from top to bottom beforehand.

I bleed when I have bowel movements.

Friendship bound them together.

He grinned broadly at us.

It's raining buckets outside.

I beg to point out that your calculation is wrong.

The calculator is a wonderful invention.

Each one approaches the task of bug characterization with a slightly different perceptual set and analytical toolkit, a different angle on the problem.