u probably took out the fill plug thinking it was the drain plug and with your car jacked up it all came out cause i checked mine and the oil came out........you have to change your oil on a flat surface and theres a plug that has a 3/4 inch rachet hole that u have to take out first.....with the acura/honda motors you have to fill it though the drain plug provided you cant get to the fill plug....thats about all i can say.....good luck with it