The Other Stall

This Could Happen To You!
I was barely sitting down when I heard a voice from the other stall saying: 'Hi, how are you?'
I'm not the type to start a conversation in the restroom. I don't know what got into me, but I answered, somewhat embarrassed, 'Doing' just fine!'
And the other person says: 'So what are you up to?'
What kind of question is that? At that point, I'm thinking this is too bizarre so I say:
'Uhhh, I'm like you, just sitting here. '
At this point I am just trying to get out as fast as I can when I hear another question: 'Can I come over?'
Ok, this question is just too weird for me. I figured I could politely end the conversation. I say: 'No........I'm a little busy right now!!!
'Then I hear the person say, nervously: 'Listen, I'll have to call you back. There's an idiot in the other stall who keeps answering all my questions!!'