I don't know whether this has been said before or not, but I just made an interesting discovery about heat shields. It seems like (accidentally) clipping the shield into the capsule as demonstrated below does strange things to physics, and I've been doing some testing in the game to confirm this. A normal capsule will lose its speed rather quickly upon entering the atmosphere and then land safely on the ground. A clipped capsule, on the other hand, will barely lose any speed at all. The heat shield evaporates as normal, but the capsule will either reach the lowest parts of the atmosphere at orbital speeds, or return to space and repeat the process until the shield gives up and kills everyone. Possible bug, maybe?