3.5 grams (3,500 mg) is known as an eight ball because it’s an eight of an ounce. The original Coke had 9mg of cocaine per serving. 3.5 grams is very likely a lethal dose.
To put this in perspective, a “line” of cocaine is estimated to be 25 to 50 mg.
I can’t speak to this personally but I’m a clinical pharmacist and I stayed in a Holiday Inn last night.