Probably the reason why you have clicked on the article is to see what the picture is all about.
Yes, its an optical illusion where your mind is not keen to details due to the speeding bike.
But if you were doing something, and probably shut down everything, you will be able to see the school girl carrying a bottle in her pocket.
The bottle is popularly used to package alcohol liquor.
Whether it was alcohol or not, only an alcohol blow could tell.