Girls, hi everyone! I'm writing because I just finished a 10-minute or…

Girls, hi everyone! I'm writing because I just finished a 10-minute ordeal... We bathed the baby (2.5 months old), started gently massaging her with cream (she was lying on her back) and suddenly her chest cavity compressed, from fright she raised her body up for 5-10 seconds. I look, it's over. Now the child is in stable condition. Who knows what that was? Has anyone had their chest cavity compressed like this?