So sometimes Second Life glitches; you may walk through a partially rezzed object that suddenly restores its properties, and you’re stuck inside it. Sometimes, you follow an outdated landmark, and again, you’re inside an object or under a store rather than inside it.
Whatever got you into a thrift, you can get out of it easily by touching CTRL+M to open the world map, then choose a spot right in front of you and teleport to that spot.
Another good tip for situations like this is to open the land profile (“land” button) and find the options tab. If the parcel has a landing spot defined, you can click the button to teleport to the current landing spot.
Another thing you can do by teleporting right in front of yourself is to save your current spot in your teleportation history. This is handy when you’ve arrived at this point by sim-internal teleporters, and your “back” button will take you to the first sim-landing spot you chose rather than where you were last. So, if you are planning to go somewhere for a moment only to return where you were before, teleporting right in front of your current position first saves this spot as a return spot.
Cheers,