You can chain against the effect of “Byser Shock”.
A Trap Card like “Ceasefire” that is chained to the activation of “Byser Shock”’s effect is not returned to the hand.
Netrep Rulings:
“Byser Shock” does not get its effect if Special Summoned face-down. “Byser Shock,” if later Flip Summoned, it will have its effect resolve at that time. “Byser Shock” will not receive its effect if Flipped as a result of an attack or an effect.
If “Skill Drain” is active or activated in a chain to “Byser Shock’s” effect, the effect of “Byser Shock” is negated.