If you're caught you will get sent to D-Block solitary, a tiny cube where days are marked by a light shaft travelling across the wall - or you might be interrogated using techniques only alluded to in the otherwise thorough Alcatraz audio tour, with first-hand accounts by prison guards and prisoners of the Rock.

BBC: A tour of San Francisco��s Alcatraz

There's also Common, E-40, Ice Cube, Busta Rhymes, Scarface, Slick Rick, KRS-One, Chuck D and Q-Tip -- again, a poetic bunch who've been in the game for more than a minute -- but none is Nas.

CNN: A case for Nas, hip-hop's finest MC

Take, for example, the 2004 film Crash, which tells interweaving stories that could be presented simultaneously with such a display -- simply rotate the cube until you land on a narrative you'd like to follow, and the soundtrack will adjust to match.

ENGADGET: OLED Display Blocks pack six 128 x 128 panels, we go hands-on at MIT (video)