Horror Box: Catalepsia

It is very hard to give a true overview of this game without giving things away. You will have read that you are locked in your own coffin, with your team mate in the coffin next to you. The coffins are pretty generous in size (I am 6ft1), very comfortable for most of the game (it gets a bit hot towards the end, so dress lightly). You have 30 minutes to escape, working with your team mate to solve a number of puzzles.
This was the single most fun room that we did in Barcelona. It is unique, as far as I know, and may not suit you if you are genuinely claustrophobic. If you are just a bit worried about it then I urge you to give it a try (and there is an emergency "out" -  make sure you read the final instructions before you sign the waiver, unlike me!). We had an absolute riot. The theming is amazing, the soundscapes are funny and the puzzles make for great team work (even though there are not that many because it is only 30 minutes). You can also tailor the experience yourself - see the details on the website. You might need Google Translate a bit for the website but the game is all fine in English.Do it. You will not regret it!