Friend of my sim died in between wall and foundation - how?

Yet another random bug that has always happened since the game was released. Sometimes Sims end up in places they should not have been able to go and get stuck there. Sometimes you can make changes to the surrounding ground or house that will prevent it from happening again, such as making sure the ground is level or placing objects that will keep a Sim from walking to the area. To fix a Sim who has ended up like this, turn on testing cheats, shift + click to reset the Sim, then turn testing cheats off.