Do your co-workers’ crazy antics make you question how you fit in at your current job? According to a new CareerBuilder survey, four-in-ten (39 percent) workers said they feel that they don’t fit in with their colleagues. The survey was conducted between November 5 and November 23, 2009, among more than 4,900 workers.

Comparing genders, more women (42 percent) than men (37 percent) report that they feel they don’t always fit in with their cube mates. When it comes to industries, health care, sales and professional and business services top the fields where workers feel that they don’t fit in with their colleagues, followed by leisure/hospitality and IT.

Workers shared some of the craziest things their co-workers have done on the job:

Co-worker ate the cheese off the pizza box at a company meeting.

Co-worker talks openly about flatulence.

Co-worker in the cubicle next to me wears 3-D glasses with the lenses removed.

Co-worker repeatedly bangs a mallet on the table for no apparent reason.

Co-worker whistles 8 hours a day.

Co-worker chews tobacco and spits it into empty soda bottles.

Former boss brought a baby sippy cup to a meeting and started drinking out of it.

Co-worker cleaned fingernails using a counterpart’s business card while sitting in their office.