  We study the quantum Goos-H\"{a}nchen(GH) effect for wave-packet dynamics at
a normal/superconductor (NS) interface. We find that the effect is amplified by
a factor $(E_F/\Delta)$, with $E_F$ the Fermi energy and $\Delta$ the gap.
Interestingly, the GH effect appears only as a time delay $\delta t$ without
any lateral shift, and the corresponding delay length is about
$(E_F/\Delta)\lambda_F$, with $\lambda_F$ the Fermi wavelength. This makes the
NS interface "sticky" when $\Delta \ll E_F$, since typically GH effects are of
wavelength order. This "sticky" behavior can be further enhanced by a resonance
mode in NSNS interface. Finally, for a large $\Delta$, the resonance-mode
effect makes a transition from Andreev to the specular electron reflection as
the width of the sandwiched superconductor is reduced.
