Riven is flying and being invisible meanwhile

So we were playing a game where i was , and was my friend. ulted and at the same time, did something like Q and at the exact same moment. disapeared and just slayed me while in the air, out of bounce for me to see. Then She came back slowly flying down like an angel hahahahhaha. Amazing. there was some confusion hahahahah. Was that normal? You let me know!