This actually happened last week thursday.
Friend is a big runner and we were on our way home from a huge track meet. (Was about 10p.m.) And his girlfriend is really really good friends with another guy in school (she thinks of him as a brother, so no cheating) and well he got mono about 2 weeks ago. Since then my friend has been freaking out thinking about what if his girlfriend gets it from that guy. So on the way back i texted his girlfriend and told her to text him that she was starting to feel really sick. He gets the message on the bus and instanstly stops talking. His face just gets so worried looking and he starts freaking out and on the verge of crying . Mono would ruin his last year of track lol. And he is freaking out big time worrying his ass off and then i finally had to tell him it was all me. He was pretty pissed but good god was that hilarious! Half the track team on the bus was laughing at him.