Frightened by the thunder at Sinai, what did the people ask Moses?

Answer: Speak to us yourself

The people trembled and said to Moses, "Speak to us yourself and we will listen. But do not let God speak to us, or we will die."

“When all the people witnessed the thunder and lightning, the sounding of the ram’s horn, and the mountain enveloped in smoke, they trembled and stood at a distance. “Speak to us yourself and we will listen,” they said to Moses. “But do not let God speak to us, or we will die.””— Exodus 20:18-19 (BSB)