Need advice about bunny fall

So I’m panicking. I’m watching a bunny with head tilt and I was going to give her a treat. She was on an upper level of her enclosure, maybe a foot and a half off the ground, and she leaned over the side too much and fell onto the mats on the bottom. I wouldn’t call it a hard fall, she immediately got up and took her treat and scurried away. But what should I look for as far as injury signs to notify the owners that I fucked up?