Blacked out? after four loko?

My boyfriend which is 26 years and weighs 200 lbs drank 3 four loko's and one 12oz coors in 2 hours. I know about all the calculations and the 2.88 ounces of pure ethanol per can and how much beers it is per can. However, all of the sudden he sat on the sofa and i guess fell asleep or ped out. Should I be concerned or am i over reacting? I'm not sure? my little 2 year old woke up and she smacked him on the face a few times without me realizing until my older daughter saw her. He did not even respond, but just moved to a different position. should i be concerned. thanks