Rumer Willis At Demi Moore's House During 911 Emergency

Rumer Willis
was at her mom”s home when Demi Moore went into a semi-conscious, convulsive state.

If you listen to the 911 tape — around the 00:54 mark — you”ll hear the caller ask, “What is the address Ru”

What”s interesting … Demi was clearly smoking something and, we”re told, inhaling nitrous oxide with her daughter right there.

Rumer, who is 23, was partying with Demi just 2 weeks ago in Hollywood.