91.   When you sit and stand, keep your head back over your shoulders, shoulders in line with your ear lobes.

92.   Why are we breaking our heads over this seemingly insignificant issue?

93.   With my body extended and head over the handlebars, I see only blacktop.

94.   An artist from Texas criticized for selling replica tattooed Maori heads over the Internet said she had received death threats from New Zealand, a newspaper reported Tuesday.

95.   At the same time, a scandal came to a head over the failure to import enough sugar last year, leading to a doubling of prices.

96.   Cox shook his head over the way the game turned in that one inning.

97.   Els also was shaking his head over what he considered a missed opportunity.

98.   Experts on writing easy-to-understand documents are shaking their heads over the disputed election ballot in Palm Beach County, Fla.

99.   He said the melody evolved in his head over a few years before he finally wrote it down.

100.   If two powerful industry groups butt heads over a technical matter, they are likely to advance competing and conflicting studies.