Possible Clues:

• 'What a surprise to see you here!'
• Surprised salutation
• "Well, hello there"
• "Didn't see you there"
• 'What a coincidence to run into you!'
• 'Surprising to run into you here'
• Infomercial host's exclamation after being 'surprised' by the camera
• ''Didn't expect to see you!''
• 'Didn't expect to find you here!'
• 'I didn't see you there!'