LaTeX: Adding an Enumerate environment to a Tabular environment

I am trying to add an ordered list (enumerate) to a table (tabular) in LaTeX with the following:

 \begin{tabular}{|l|l|}
  \hline
  Event Flow & 
   \begin{enumerate}
   \item This is item 1
   \item This is item 2
   \end{enumerate}
  \\
  \hline
 \end{tabular}

But I am getting the following error:

! LaTeX Error: Something's wrong--perhaps a missing \item.

See the LaTeX manual or LaTeX Companion for explanation. Type H for immediate help. ...
                                               l.34    \item T
           his is item 1 ?

Can anyone please tell me what is the problem exactly?

Because when I put the enumerate environment outside of the tabular environment, it works; so guess I am currently missing something with my example of the table.

Solution

The following works:

\documentclass{article}
\begin{document}
\begin{tabular}{|l|l|}
  \hline
  Event Flow & 
  \begin{minipage}{5in}
    \vskip 4pt
    \begin{enumerate}
   \item This is item 1
   \item This is item 2
   \end{enumerate}
   \vskip 4pt
 \end{minipage}
 \\
  \hline
 \end{tabular}
\end{document}

I'm guessing the trouble is that the enumerate environment needs to be in vertical mode: you could experiment with a \vbox.