It doesn't come loose

Olivia gives a few experimental tugs at the T-shirt but finds that it completely refuses to move, somehow it has become well and truly stuck firm to the shelving unit.

Cursing her poor luck she once again casts a look back at the counter, the pimply boy paying no attention to her still, and then turns towards the back door of the shop, heading into the staff room. Did she really want to risk a dash through the shop in her bra or was there a better option?