Poseidon

[Haggis Killer]

Actually, water effects are extremely difficult and time consuming. To do them right, you have to to realistic physical simulations that account for scale, volume, and tons of other water dynamics. Without the math & physics, you can't make it look near realistic. So doing a movie like this requires an up front commitment of a visual effects budget - just for the water - in the millions of dollars.

Of course, if there's enough coke on the table, that's all so much chump change for Hollywood.

Just ask Greg.