Holy moly! Your kitty, Lexi, looks EXACTLY like my kitty, Calvin... Except my kitty isn't even 10 lbs. He's a little guy... But tromps around the house with the footsteps of a herd of elephants!
LOL! My hubby and I joke all the time about our 'graceful' cat. He jumps off of things and sounds like a sack of potatoes hitting the floor. He's been known to fall off the couch... and we laugh at him if he tries to jump from my dresser or his window seat to our bed and misses... I know, we are mean. But he is such a lovey, affectionate kitty!
I have three cats.. Once like your gray one.. his name is Baby and a black one.. Puss Puss and one that looks like a Burmese with strips ( yeah I had to look that one up) Her name is Segeria ( my daughters cat ).. and too dogs Abby and Charlie ( he is my avitar)
My sister has 10 cats! All indoor cats too.