Not really in public, but speakerphone is sometimes useful to be able to look something up on your phone in the middle of a call, e.g. checking your calendar when booking an appointment. And if someone called you then you’re less in control of whether it’s in public or not.
Red Dwarf - Psirens (1993)
As KRYTEN and LISTER head for the cockpit, the airlock monitor fizzes on again and a SECOND LISTER appears on the screen.
LISTER 2: What the hell are you doing taking off when I’m still outside? Let me in.
KRYTEN double-takes between the LISTER inside and the LISTER on the monitor.
KRYTEN: I’m afraid, sir, you’re already here.
RIMMER steps down from the cockpit.
LISTER 1: He’s a Psiren – don’t let him in. LISTER 2: For god’s sake – I can’t hang on any longer. He’s the Psiren. Let me in! RIMMER: What do we do? KRYTEN: there’s no way to tell which is which. We have to let him in. RIMMER: That means we’ll definitely have one Psiren on board. A brain- sucking psychotic temporal lobe slurper. KRYTEN: There’s a fifty per cent chance we have one on board already. We can’t risk killing the real Lister. I’m letting him in.
“Fuck it, Dude. Let’s go bowling.”