Me: *pulls reference manual from shelf*
Shelf: BANZAI! DIE, OPPRESSOR PIG-DOG! *domino-collapses and pours books and knick-knacks from both ends*
Me: ACCCK! *tries to simultaneously catch several dozen items falling off both ends of a 6-foot-long shelf*
Me: *fails miserably*
Me: *is standing ankle-deep in detritus, being stared at by entire department, clutching villanous single book in one hand*
Coworker: It would seem that book was the load-bearing boss.