11.   And in the days when crossover was a dirty word, they were constantly pushing the envelope.

12.   And there are ads that push the envelope in other ways.

13.   And they are pushing the envelope of racing technology, developing the first electric-gasoline hybrid car for the track.

14.   And yet she agrees that Maxim has pushed the envelope.

15.   Ansell, meanwhile, is pushing the envelope in other realms of advertising.

16.   Any show that pushes the envelope so brazenly, and rises to a high level of originality and brilliance, must fall on brief stretches of mediocrity and failure.

17.   As for future projects, Size said he was going to keep pushing the envelope and seeing what results.

18.   As long as TV pushes the envelope from one end, movies will pull at the limits from the other.

19.   As much as they push the envelope of what men and flying machines can do, they are also related to textbook military flying.

20.   As the new coach on the block, Leach is not willing to push the envelope past the point of tolerability for West Texas residents.