This is the script in ClientCommands:
["bubble"] = {
Function = function(speaker, args)
local plr = args[1]
local torso = plr.Torso
if torso then
local part = Instance.new("Part", torso)
part.Shape = Enum.PartType.Ball
part.Transparency = 0
part.CanCollide = true
part.Size = Vector3.new(10.14,10.14,10.14)
part.Parent = torso.Position
end
end;
};

2 comments
As following up to my you aren't setting a position, you need to disable collison on the bubble inless its holo. You could unanchor it and then weld to the torso, that would work. Also you need to use whatever is HD admin's getplayer function in order to not have to type full usernames (inless HD admin doesn't do that)
Wait, you also are going to a torso on a string.