My bathroom fixture has one of these and I can seem to remove it.
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It only takes a minute to sign up.Sign up to join this community
With a glove (in case the bulb shatters), push it sideways (assuming it's horizontal) and then pull forward.
When replacing, do not get skin oils on the new bulb... it is highly likely to break. You can use a paper towel or something similar.