After driving 2 blocks I knew something was wrong with the engine, and when I stopped and checked under the hood I discovered that 4 of the 8 spark plug leads were there but disconnected.
This was the first time the car was driven after someone had given it a 'tune up'. I always wondered if it could have been dangerous if I hadn't stopped and checked this myself just before I got on the highway? I was never able to ask the person who did the tune-up. Thank goodness I knew a little bit and reconnected the leads before I drove any further.
My question is this "how dangerous would this have been to my vehicle and/or myself" if I had not caught it so quickly? Thanks very much for your opinion.