line break after a new theorem

[Theo]

Hi,
I have a question for which I can't simply google the answer:
How do I force the text after a theorem to start at the next line?
If i simply use
\begin{theorem}
Some theorem
\end{theorem}
I obtain (with amsmath/latex)
Theorem 1. Some theorem
If I use
\begin{theorem}
\newline OR \linebreak OR \\ OR anything else, really
some theorem.
\end{theorem}
I get an error saying there is no line to end (I never understood
this. Just skip a line, dammit!)
Thanks for any help...!

[Werner Grundlingh]

...or something as simple as
\begin{theorem} {\ } \\
Some theorem.
\end{theorem}

Werner

[ferry]

or simply

\begin{theorem}{\ \\}
Some theorem
\end{theorem}