The Rail Trail Time Warp
If we slow the speed of light (300,000,000 m/s) by a factor of one hundred million it becomes a leisurely 10.8 km/hr... so you may find yourself time-travelling into the future as you cycle along!
In this scaled time warp a single second equates to over three years of real time, so our average life span would be just 26 seconds — in fact Homo sapiens would have existed for less than 18 hours, and dinosaurs would have died out just eight months ago.
Even the speed of sound (340 m/s in air) slows in our shrink-wrapped Solar System. It would take nearly a year for your bike bell to be heard just 100 m away!