Mine was a remote worker couldn't get in touch with a colleague by phone as the colleagues phone was still on the call that they'd shared moments earlier but that she had got cut off from. I listened patiently for her to explain this and then she asked me what she should do. Short of me being able to magically connect their call again, I advised emailing said colleague so they could explore other forms of contact. This isn't an I experienced colleague, but there are a lot of these 'WTF' moments.