Faster than the Space Shuttle: A flea.

When they jump, fleas accelerate faster than a space shuttle. In fact, more than 20 times faster. Due to their size and the force used to jump those great distances, their acceleration is approximately 100 times the force of gravity.
Read more: https://www.crispbot.com/facts/faster-than-the-space-shuttle-a-flea/?source=Snapzu