I saw my fish tank. Alittle small tiny fish. I remember it beieng a white long tail guppy. It killed a little new tiny small fishy i bought newly. I took the bad naughty fish out of the tank and put it on the tank until it died ! I felt and still feel quitly and bad. I was a bad boy but is it normal that i did it? Am I a bad human ? a murder ?

frankly, i think you were in the wrong.
next time think before you act like a moron.
If i had to choose between beating and suffocating i would say suffocating is more humane unless you can kill the fish with one strike.
You say that you were high when this happened? Then what you did sort of makes sense... Be happy that you aren't like that girl and that you can actually feel remorse.