"No."  Ten answered Clara, somewhat puzzled.  "The TARDISes of one of my past selves and I merged.  That was my fault, really.  I was rebuilding the TARDIS, forgot to put the shields back up, and snap!  One TARDIS, two different voyages in the same time stream, an unprecedented collision, and we almost caused the end of the universe."  At the end of his short speech, he had a huge grin on his face.  "Oh, that was fun."