I drank 1 and a half beer bottle (650 ml + 325 ml) and ate 1 full chicken at around 4 pm thereby making my stomach with a feel of overeat. Thereafter I have tea at 7 pm with light snacks . By this time my dizziness of beer was completely over and i was feeling ok but by belly was tight. At night I ate my dinner at 9.30 pm again some heavy stuff of chicken. There after i drove for about 35 miles with my belt on and with a feel of tight belly and overeaten food. While I was approaching my home I felt that I should vomit out so that i could feel light. I vomited and it consit of mainly chicken uncooked pieces. My question is this vomiting occurs because of drinking beer or because of overeating chicken ?