The summary is:
The speaker tries to upgrade from the slowest bike to the fastest bike in GTA 5 by testing different bikes and their speed, weapons, and tricks. He starts with a unicycle that goes 18 miles per hour and ends with a futuristic bike that goes 85,000 miles per hour and flies into space. He also attempts to hit planes and helicopters with his bike and shoots fireworks at cop cars. He records his reactions and asks the viewers to subscribe and like the video.
Here are the key facts extracted from the text:
1. The text is a transcript of a video where the speaker is upgrading from the slowest bike to the fastest bike in GTA 5.
2. The speaker starts with a unicycle that goes 3 miles per hour and ends with a bike that goes 85,000 miles per hour in space.
3. The speaker tests each bike by jumping over people, hitting ramps, and shooting weapons.
4. The speaker uses Franklin's slow speed mode to measure the speed of the bikes.
5. The speaker performs various tricks and stunts with the bikes, such as backflips, kickflips, and RPG trick shots.