A phrase used in response to someone who is disappointed in a thing that turns out to be underwhelming and bad/mediocre to assure them that can just be how things go sometimes.
A reference indicating that the person being doubted is lacking in the mock politeness required to convince someone that the person really cares about attending to events, duties or rituals that no-one should ever be asked to perform.
From a quote from the movie Donnie Darko. Sparklemotion is a set of six year old girls doing a Solid Gold dancers act.