41.   The comedian Sinbad stars in the commercials as laughing teenagers try, among other pranks, to get the guards at Buckingham Palace to crack a smile.

42.   The guy had better ease up, take a load off, crack a smile once in a while.

43.   When a mystery is this sure-footed, even a tough guy should crack a smile.

44.   When I showed them examples from my own collection, these people flipped through them cursorily and never even cracked a smile.

45.   Which means, of course, that hardly anyone ever cracks a smile.

46.   Williams, dapper in a crisp navy blue, pinstriped suit and dark tinted eyeglasses, cracks a smile as he relaxes in a suite at a Manhattan hotel.

47.   While Hubbell cracked a smile telling this story, it was clear his re-emergence into the public spotlight did not come easily.

48.   After months of gloom, many people are desperate to crack a smile.

49.   Allen stood silently in the back of the City Hall hearing room, not cracking a smile.

50.   Courier then cracked a smile and addressed British journalists.