Don't let the innocuous title fool you. Family Weekend is a subversive little comedy in which a tightly wound misfit of a teenage girl, fed up with watching her family spiral out of control, subjects her parents to an extreme intervention.

The unconventional dysfunctional family has now become a Hollywood convention. It is familiar to a fault.

For a long while, director Benjamin Epps goes for breakneck farce; at its best, this is a batty mixture of family-values editorial and teen spoof.

Watching "Family Weekend" you feel as trapped as the tied-up parents, wondering, when will it all end?