Chicago’s Adler Planetarium has a “Far Horizons” educational program that sends up experiments to the edges of space via weather balloon. They recently began a rigorous Peep Space Program, recruited various shades of prospective peeponauts from the Marshmallow-American community, and after putting them through a series of training and endurance tests, launched one lucky yellow Peep up to where the curvature of the earth can be seen. The entire launch and the beginning of the descent are on a video, but there’s also a video of the centrifuge test (note: rubber band and ceiling fan were not harmed).
Here’s the image of the close of the vacuum test. The subjects found this one rather exhausting so no public interviews were granted immediately afterward.