7.) Trying to merge onto the highway at 45 mph
Almost all modern vehicles can accelerate to 65 mph in a quarter-mile without breathing too heavily. If an AMC Pacer can do it, any snowbird's car can do it. Yet, while everyone's cruising at 65 mph or more, one person decides that everyone needs to slow down by 20 mph, because they didn't feel like bringing their vehicle up to highway speed before merging onto it.