The myth about the human brain only using a small fraction of its theoretical capacity has been busted a long time ago.
Nish uses a small (about two square meters) fold-out solar panel to recharge her car. Even if they are 100% efficient at capturing the energy from sunlight (modern panels are 15-25% efficient) and used on a bright sunny day, panels that size would only produce about a kilowatt per square meter. This is about 1.5 horsepower per square meter and not nearly enough energy to run something the size of her car at highway speeds.
The hologram of Clayton the Weather Girl Killer screams with pain when the electrocution is simulated. This is inaccurate since the electricity causes all the muscles to spasm, locking the jaws shut. Victims are given a strap or something to bite down on so their teeth don't break. However, holograms don't have muscles and would obviously react differently.