Don't you love it when Bettas act impatient? They do the funniest things when they want something NOW - like getting out of the bag and into that new
betta palace with room to swim. Our 1st Betta Mario once scared us silly when we had him in a cup floating to get the cup water & tank water even after some major tank redecorating and we came over and he wasn't in the cup!

.. he had jumped out into the tank.. had to have cleared a good 3" to get out of the cup.. They love space so much, I feel like breaking those tiny betta prisons the pet stores sell with barely enough room for the Betta to turn around.
Congrats on your new baby.. he's going to be a character for sure - first day and you already have a funny story about him. Looking forward to pics of him.. we saw a blue CT at the store today that was SO hard to resist.. blue is a great Betta color. Good name for him too - he's a little tough guy and maybe you can find some Betta-safe medieval decor for him.