I find that my DD startles very easily. DH says she gets it from me, as i startle easily to. The other day she was playing on her mat when my MIL appeared, saying hello to her. DD screamed (i mean i dont blame her in a way hehe..) Also when she is in the baby bjorn facing the world, and the trucks wizz by i feel her feet go back. When i move the toy bar on her rocker it makes a loud clicking sound, she will startle too.. is this normal?