1.   They grip the lectern, their knees knock, and they sweat profusely as they try to get their point across.

2.   My knee accidentally knocked against the table.

3.   Her knees knocked every moment in the air.

4.   His knees knock before aristocracy.

5.   One slug makes your knees knock, two make you drool and three fell you like a redwood.

6.   The knees knock.

7.   There are those whose knees knock especially hard in the Ryder Cup.

8.   Hartnett began acting in high school after an injured knee knocked him off the football team and he auditioned for a play.

9.   Knees are knocking, teeth are gnashing and very few players in the NBA Finals are overcoming the pressure with much grace.