Random dude gave me 2 mill

So I was training Agility at Canifis when a random dude gave me a chat. At first I thought he was gonna advertise me about a phishing site or something, but I replied just for fun.

He said he was gonna give me 2 mill, I just had to meet him in the GE. I was sure he was trying to scam me, but I'm a mid level on osrs and had nothing to lose. Also I had all my items in the bank.

When I got there, I thought he would say "show me one of your valuable items" or something like that, but he didn't.

He traded me, gave me 2000K, teleported away before I could even say thank you, then logged off.

That was such a weird experience. When he chatted me, he was in another world - so I have no idea how he found me.

Is this normal? I am so thankful, but that was kinda... Weird.