you had to have heard something before it went. Loud tick,knock etc.. rattle. Take into the dealer they will find out what happend excatly on the computer and when it happend and other criteras like over reved the motor etc.. most newer cars now atleast honda's and acuras have a drive recorder once triggerd and set to a trigger point and something that isn't into its specifications or doesn't pass certain enabled criteras it starts recording in I think 15 intervals before during and after the problem.