Jump through the portal

You jump through the portal! and you land in the laboratory of the local hospital
A doctor notices your presence and says that you have to leave, this is a restricted area.

You apologize, and you quickly return to your apartment.
Yes!! You’ve returned to your world!

When you arrive at your home, you pack your belongings. The memories of the creepy hospital, the city, and the whole upside-down will haunt you for the rest of your life, but you will never return!!