Inflatable Antenna Experiment

The Inflatable Antenna Experiment (IAE) was a NASA experiment that began on May 19, 1996, consisting of an inflatable antenna made of mylar which was launched from the Space Shuttle Endeavour during the 1996 STS-77 mission, in cooperation with the satellite Spartan-207. The deployment of the antenna did not go as planned due to "residual air in the stowed structure and a significant amount of strain energy release from the torus structure" leading to unexpected rotation but ultimately the correct shape.

Source: Wikipedia — Inflatable Antenna Experiment (CC BY-SA 4.0)