A current law, if any, will affect how we draft our bill. If steamboat racing is already illegal, for example, we might want to make the existing law stricter. As it happens, we don't find an existing law against steamboat racing, so we will draft a bill to make it illegal.
Dizziness. Dizziness has been reported by people with high blood pressure, depression, osteoporosis, multiple sclerosis, high blood cholesterol. (latest reports from 162,517 Dizziness patients). On Jul, 24, 2015: 85 people reported to have side effects when taking Coffee. Among them, 3 people (3.53%) have Dizziness.
Assuming you drink the same amount of coffee when the dizziness happens as when it doesn't, the answer may be simple: because different coffees have different amounts of caffeine. Take note of which type of coffee affects you in different ways. Above some limit of caffeine, you get dizzy.