So long as you don't take what would be interpreted as a hostile action, you should be safe.

Phone Booth is a 2002 American psychological thriller film directed by Joel Schumacher and starring Colin Farrell, Forest Whitaker, Katie Holmes, Radha Mitchell, and Kiefer Sutherland. The film follows Stuart Shepard (Farrell), a New York City publicist who is trapped in a phone booth after receiving a call from a sniper (Sutherland) who threatens to kill him if he hangs up. The film is set entirely within and around the confines of the phone booth, and explores themes of guilt, redemption, and the power of the media.