i had the same problem on my car a few weeks ago,and also happened on another lexus i owned some years ago,started the car run for around 5 to 10 seconds turnd of and woundnt restart,felt like the car was flooded,left for 30 mins then tried again,started after quite a few turns,been alright since,nothing to worrt about,how many times are u going to start a car for 10 sec, or so,turn of and restart,almost never.