Jules' gag changes drastically after the shuttle crash. Before, it was very thick and wrinkled. But when she wakes up after the crash, it's barely wrapped around twice and perfectly smooth.
He was hit in the head with full force with a steel fire extinguisher, people have been killed with less, yet he regains full composure soon afterwards even after hitting the front of the bus from momentum and an accident. The gash on his head shows how severe.