Another behavioral trait is the coma state, broadly a cognate of the human fetal position–in the same way that ostriches are said to bury their heads in the sand, Puppeteers fold up into a ball, tucking their three legs and two heads underneath the padded cranial bulge. This is, in part, an explosion reflex, learned during childhood. Their cowardice is also reflected in their architecture and object design, as all the Puppeteer-designed rooms and vessels have no sharp edges, everything curves into everything else, giving a "half-melted" look and meaning that objects are less likely to damage someone inadvertently, through their own carelessness.