If Someone Falls Into a Swimming Pool

io9.com has a great Survival Guide to Bad Scifi Movies:

A few signs of a bad movie

Sunglasses in the poster. If human adults are wearing them, it's bad. If babies or animals are wearing them, it's worse. If adults are looking over the top of the sunglasses, it's horrendous. If a baby or animal is looking over the top, it's a sign of the apocalypse.

If someone falls into a swimming pool.

If there's a hot-air ballon. (Quoth Roger Ebert: "Good movies rarely contain a hot-air balloon.")

If it takes place in Venice Beach. Very few good movies were shot there.

Check it all out.