it doesn't reflect badly on your work history that you've been laid off. employers are more savvy than that, they know the economic conditions are fluid and these things happen. be straight forward, this may come off as an embellishment and send up red flags for the prospective employer to look closer for more of the same - which we all do - hey we're trying to get a job and want to present ourselves in the best light possible. just my 2 cents, but i'd be wondering why you even thought it necessary to mention the why, instead of the fact that it just happened.
good luck
good luck