Some of the first roller coasters appeared back in Coney Island with the Loop the Loop, which was known to cause harm to its passengers. In 1984 the Rail Blazer at Six Flags, another popular park in the '80s, was opened it was one hundred and six feet tall with a drop of 100 feet and over 1800 feet long. The Roller coaster was one of the first out of 6 to have a stand-up cart in 1984, but after a woman had been thrown off of the Coaster and fell to her death, all stand-up coasters were recalled and stopped being manufactured. As of now, Roller coasters have stricter safety regulations due to accidents that happened in the '80s. 

Ferris Wheels were among the most popular of Park rides, also having a long history into the 1800s when the first one was made in Columbia in 1893. Ferris Wheels were also a popular ride with traveling Carnivals, being able to be broken down and moved without a problem. Along with the Ferris wheel, it also had a cousin of the sorts, called the Sky wheel. I can only describe this thing as a double Ferris wheel. This Skywheel became popular in the '80s but due to upkeep and travelling cost, the SkyWheel can only be found in select Venues.   

The Gravitron, although not as popular as the other rides in this list, was one of the more recent rides built, Having first appeared in 1983 at Montey Piers. This ride became widespread as it began to move around with the Traveling Carnivals being so easy to pack up and having a low maintenance cost. The Gravitron works by spinning around in circles fast enough for you to stick to the walls and change where you feel yourself being pulled (hence the name, Gravitron). This ride can still be found at many traveling carnivals today, though It is known to make passengers sick from all the spinning.