What are reasons to choose a scripting language over C#?

Question

What are reasons to choose a non DSL scripting language over statically compiled language such as C#?

-edit- Good answers so far. I feel I should explain further. I

Answer 1

Scripting languages excel primarily in 2 areas:

1. Small to medium sized projects where performance is not a top priority and flexibility in the runtime enviroment is.

2. The construction of domain specific languages. The duck typing, dynamic method invocation capabilities of a scripting language make it ideal for designing domain specific languages. Ruby on Rails, of course, is the poster boy for this capability, but numerous other examples exist especially in proprietary in-house developed software.