Crowd Pleaser

This achievement is related to the Torment Claustrophobic.

Easiest way to do this is find 5 Mawrats and let them sit on you for 30 seconds.

Torments cycle daily per wing so check back daily to see if Claustrophobic is up.

As a stealth class, you can just stealth near a pack of 5 and wait 30 seconds

Before attempting this, you might want to check what Blessings are active as well - if Surging Power is up, this achievement becomes close to impossible for any non-stealth class. The rotating orbs of energy will kill off any weaker mobs long before the 30 seconds are up, and gathering 5 enemies who can survive that long are likely strong enough that survival over 30 seconds under Claustrophobia becomes a truly daunting task, at least if you're on level 12, and depending on your gear. Had real troubles so far with a 242 prot pala. And depending on how far you've skilled into The Box of Many Things, you may need to go to level 12 just to get the Claustrophobia torment.