But if Felipe Calderon was feeling worried, he wasn't showing it when he appeared before an estimated 100, 000 people on Sunday.

NPR: 'Disobedient Son' Leads Mexico's Conservatives

When I first was at Facebook, I was definitely feeling way unbalanced and more worried about not seeing my kids.

FORBES: World's 20 Most Powerful Moms

The Kelton Research survey on vacation patterns found workers worried about falling behind at work or simply feeling that they had too much to do to step away.

FORBES: Message To Brands: Give Americans A Break

But, for this one guy, I worried about his wife -- on top of feeling bad that he had to live a double life.

CNN: In the Field

Some start feeling they can't keep up like they could when they were younger or become more worried about injuries.

BBC: Too many men 'unconcerned' about weight health risks