Hmmms, Neat question! Have to agree, when I'm in the groove of much of anything artistic, Poser, Mehndi, Welding, whatever, I have no concept of time or the world around me.... Except strangely enough Music... A movie can be blaring in the background and I don't even notice, put on a CD of any music that I'm familiar enough to know the words/notes to and I just can't concentrate enough to do type or model... Weld and Mehndi, yes, Poser or LightWave no. How's that for one fly in the ointment?