Bite the Dust (go down in defeat)
Andy did exceptionally well in all of the track events, but he bit the dust in the high jump competition. Much to the disappointment of his fans, he went down in defeat, losing to a competitor from the visiting team.
Bend Over Backwards (try very hard)
When Joan first started teaching, she was afraid that she would have a lot of trouble getting used to the kids and to the faculty. Her fears turned out to be unfounded, since everybody bent over backwards to help her. Everyone tried very hard to help her feel comfortable and adjust to the school.CE