Possible Clues:

• "Well, howdy"
• 'Um ... fancy meeting you here'
• "What a surprise to run into you!"
• 'Didn't think you'd be here'
• "I wasn't expecting you!"
• "Well, howdy!"
• 'Funny bumping into you here'
• 'Funny meeting you here!'
• ''I didn't know you were home''
• 'I didn't think you'd be here ...'