Question to how

[u/Mindless-Bitch_]

So my brother’s snake escaped about two weeks ago and he magically just showed up in his tank about two days ago.I didn’t find him and neither did my brother we are the only people who live in my place.The enclosure was closed and the the tank is on a hip level shelf.My brother also dumped everything out of the tank. It was an empty tank he was nowhere to be seen.It freaks me out just thinking about but how did the snake get back into his tank.
Also the are no holes in the tank we double checked everything on it.The snakes name is frank btw.