Today this guy carrying a guitar was running at break neck speed towards me from quite a far distance. He was waving ridiculously but I couldn’t make out who he was from how far back I was.
So I did what any rationally minded, smart, spunky female would do in my situation: looked and saw no one else around me, assumed I knew him, sped up my pace, flashed my best grin and waved back.
The bus stop was apparently right behind me.