It is a LOGO, They are saying basically if you know not to jump infront of a train to know you'll die then why try drugs if you know there bad like why try and hit your head with a hammer if you know you'll bleed
See Ya Broski!
C, who will you invite to the carnival and fireworks display?
lol
Imagery is when a sentence has descriptive details that help you see what the author wrote.
Example: The frail girl crept through the dark, dusty hallway. Her bare feet blue from the cold, stone floors.
so i would say that the sentence you provided was using imagery :)
