Sake-bomb

I didn't know this drink. When I went to the Japanese stake (Teppan-yaki) restaurant, I shared the table with young American guys. They were nice and friendly. They found I was Japanese and recommended me their sake. I like sake. I had a cup of sake from theirs. But they also recommended a "sake-bomb" to me. I didn't know that name and I wondered about their glass. Their small cups for sake were put on the bottom of beer mug cups. They taught me about the "sake-bomb".
Most of American young people seem to know "sake-bomb". I explain it for Japanese readers. First, beer is poured a half of small beer mug cup. Second, sake is poured in small sake-cup. Third, sake-cup is dropped into the beer mug cup. Last, you drink this blended alcohol in one drink!
It was a little weird. Do you blend sake with beer? But they did that. With some curiosity, I also tried. The taste is... hard to tell. It was not bad. It was not special. If you want to taste real sake, I don't recommend the sake-bomb. It is a kind of party style.
But in the next morning, I found why people call that drink a "bomb"... Headache... I was hung over.