 But if you tell yourself you're excited, that changes everything. So we've actually shown, for example, that when students are sitting for really important tests, when they interpret their sweaty palms and beating heart is a sign they're going to fail, they do. But if we can remind them that that beating heart is a sign that the heart is shunting blood to the brain so they can focus and think, they actually perform better. I also tried to use the energy, the electricity in the building.