Should I not worry?

Yesterday I let a friend drive my car with a manual transmission. Since he is a friend I figured he would be respectful enough to treat my car properly. For the most part that is exactly what he was doing. Then all of a sudden he rides first gear until 5500 almost 6000 rpm, and shifts into second gear. The car lurched forward and kept going fine. Here is my biggest concern, I have a 2015 Subaru XV Crosstrek. Another one of my friends owned a 2013 XV crosstrek manual, and messed up his lifters, and eventually blew the motor from driving and shifting the car like he it was a wrx. My biggest concern here is, do I have anything to worry about? Or since this has never been done once before by myself, and i take fantastic care of the car. I regularly perform any maintanance required on my vehicle, and I had just changed my oil 2 days prior.