I Bought 3 BFC Energy Drink

The first time I bought a BFC Energy Drink can it took me about 3 hours to drink it. I dont see how my cousin can drink 2 of those in 10 minutes. When I finish 1 can, my heart was moving fast.I had a very hard time staying in one spot. My heart was moving very fast, and I started to get tired about 8 pm the next day.