cycle paths

Google Netherlands' April Fools' 2016 video presents a fictional self-driving bicycle for Amsterdam, framed as a serious product launch.

A comedy-music medley from the Australian band The Axis of Awesome showing that dozens of famous pop songs use the same four-chord progression. The performers cycle through a long list of hits over the same chords.

A That Mitchell and Webb Look sketch in which a hospital A&E is staffed by homeopaths who dilute everything, leaving patients with nothing.

A short Simpsons clip in which Principal Skinner explains the cycle of introducing a new species to deal with a previous pest. It is a joke about ecological interventions that backfire.