Probably flooded. It can happen if you start it and don't let it run very long then shut it off. Sometimes the next time you go to start it it'll be flooded. I've had it happen dozens of times to the Mirages at work. I drive them into the shop in the am to change oil then sometimes they're flooded when I go to pull them outside. If they're bad enough I've had to pull the spark plugs to clear all the fuel from the cylinders cause they're fouled and won't spark.
There's a chance that was your only problem and your fuel was fine. Having fresh spark plugs and a good battery will lessen the chances of that happening again. It seems to happen more often in the cold but I've got a car in the shop that hasn't moved in weeks that was flooded when I went to start it the other day. Plugs were worn so bad that the tip of the plug looked like a knife edge.
View my fuel log 2014 Mirage SE wussie cvt edition. 1.2 automatic: 37.7 mpg (US) ... 16.0 km/L ... 6.2 L/100 km ... 45.3 mpg (Imp)