You are at a party and you witness your friend smoke marijuana (i.e. cannabis, weed). A few minutes later, she gets a call from her mother asking her to come home immediately. Your friend drove to the party, and plans on driving back. She claims that smoking marijuana makes her "more focused" and a "better driver." What will you do?

Recreational cannabis use has effects on the mind and cognition which can impair tasks like driving. Consequently, I am concerned about my friend's ability to drive home safely. Of course, I understand that my friend is likely stressed and wishes to get home as soon as possible to fulfill her mother's request. However, this cannot be at the cost of driving impaired which can end up in an accident that can cause serious damage to both my friend an... (+ 139 words)