Conversation so far:
What is Patti Lupone's stance on distractions from audience members?
Patti LuPone opposes recording, photographs, and other electronic distractions in live theatre.
Why does Patti Lupone oppose recording?
Patti LuPone stated, They're seeing texting, they're seeing cameras, they're listening to phone calls. How can we do our job if the audience is distracted?.
What does Patti LuPone do to prevent audience members from recording?
Once, Patti LuPone stopped her performance and demanded the disruptive person be removed.
Have audience members interrupted Patti LuPone's performances?
Patti LuPone, irritated by flash photography, stopped in the middle of Rose's Turn and loudly demanded that the interloper be removed from the theatre.
Did the audience member get kicked out from Patti LuPone's performance with their flash photograhy?
After he was removed, Patti LuPone restarted her number. The audience applauded her stance.

Question: What did she do with the audience member's cellphone?
Self-contained rewrite: What did Patti LuPone do with the audience member's cellphone?