I used to take alcohol regularly, and I don't remember suffering from any of these conditions. Even none of my friends who consume alcohol has experienced any of these syndromes. Common, coma as a result of alcohol consumption? This is ridiculous.
He did say it depends on the amount taken and the physical condition of a person, so maybe you just handle alcohol better than some people. One thing it can cause is for you to get a distorted picture of reality around you and act inadequately and that's bad enough.
I remember I once drunk about half a liter of vodka at a friend's house. My friend was already wasted and I felt tired too so I lied down on a bed with the intention of taking a nap. I must have slept no more than one minute as another guy who was there recalls and I jumped from the bed in sort of a panic and ran outside. During that minute of sleep I had a dream that the IRS with SWAT teams have confiscated my friend's house and taken everyone away. I woke up and couldn't differentiate between the dream and reality. I wasn't going to let the SWAT guys capture me, so I ran outside and started running through the streets. At the same time I was also looking for my friends by banging on the doors of houses where I supposed they were being held. Weirdly and luckily for me nobody opened their door. Mind that this happened on New Year's Eve and I went out with bare feet and not too much clothing. Cold made me sober up in about half an hour but when I did I was somewhere I had never been before and I had to get a cab. Went straight home, the cab costed a fortune.
As I think this over now, someone could have opened his door and given me a serious ass kicking. In fact I'm pretty sure if the guy whose door I was banging on was just as wasted as me and had a gun, he might have even shot me.