[Abagail]

Maybe something like this?

TogglePlayerControllable(playerid, 0);
new Float: X, Float: Y, Float: Z;
GetPlayerPos(playerid, X, Y, Z);
SetPlayerPos(playerid, X, Y, Z-10.0);
SetPlayerPos(playerid, X, Y, Z+0.5);
TogglePlayerControllable(playerid, 1);