Dallas Willard noted an experiment done with mice a few years ago. A researcher found that when amphetamines are given to a mouse in solitude, it takes a high dosage to kill it. Give it to a group of mice, and they start hopping around and hyping each other up so much that a fraction of the dosage will be lethal—so great is the effect of "the world" on mice. In fact, a mouse that had been given no amphetamines at all, placed in a group on the drug, will get so hyper that in 10 minutes or so the non-injected mouse will be dead. "In groups," Willard noted, "they go off like popcorn." You'd think only mice would be so foolish as to hang out with other mice that are so hopped up, so frantically pursuing mindless activity for no discernible purpose that they put their own lives at risk.