I accidentally killed my friend's rabbit :(?

This is how it happened. I went over my friend's house and she went to go to the bathroom. Her rabbit was in his cage and I went over to pet him and play with him cause I was bored. So, I took him out of the cage (she doesn't mind) and let him walk on the floor. I had a red bull that I was drinking and the rabbit kept trying to get to it, but I pulled it away. Finally, I was curious if he would drink it, so I poured some in his bowl and put him back in the cage. He started acting funny and just fell over after like2 minutes :/ I ran outside and threw him over my friend's fence into the neighbors yard and came back in. My friend noticed that the rabbit wasn't in his cage when she came back to sit on the playground where I spent most of my days Chilling out, maxing, relaxing all cool And all shooting some b-ball outside of the school When a couple of guys, they were up to no good Started making trouble in my neighbourhood I got in one little fight and my mom got scared And said "You're moving with your auntie and uncle in Bel-air" I whistled for a cab and when it came near the License plate said "fresh" and had a dice in the mirror If anything I could say that this cab was rare But I thought nah, forget it, yo homes to Bel-air! I pulled up to a house about seven or eight And I yelled to the cabby "Yo, homes smell you later!" Looked at my kingdom I was finally there To sit on my throne as the prince of Bel-air