Car dash flickers then car shuts off
 

Has anyone had this weird problem...where their car shuts down randomly? The dash lights will flicker very fast then car dies! It will start back up though. Usually happens when driving slowly and turning into parking lot or out. Today on the highway going 75mph...the lights were flickering and all dash shut down...radio shut down...I saw the needles all go to zero mph and zero rpms, then shut off...but then started back up since I was still moving on highway. Any ideas? Someone mentioned a mesh ground could be disconnecting from vibration (which my engine does have an annoying vibration...possibly motor mounts). Thank you for any help/advice/suggestions/etc! My car is a Pontiac Vibe 2009 2.4L AWD.