Yes, definitely good that you found him!!
I remember when I bought the little terrarium for Deejay- she was probably 2 or 3 weeks old, pretty tiny still. The tank had a screen top that had little clamps that snapped into place to hold it. But there was a gap between the foam rockwall and the screen top, and some little air vents along the edge of the screen. Deejay squeezed herself into the gap and through the air vents, and when I went to check on her she was happily lounging on TOP of the tank instead of in it!!
Had to stuff a rolled up piece of paper towel into the gap and tape it down till she grew a bit!!