Explosion doesn't happen instantly?

I have made this simple projectile script, upon touching a part, an explosion will be created unless the part is called NON, then it will ricochet. However, the explosion happens like 0.3 seconds after touching a part, how do I fix this? this is also not a lag issue.

if math.random(1,1) == 1 then
        local debu = true
            if debu == true then
                if hit.Name ~= "NON" then
                    debu = false
                    local explosion = Instance.new("Explosion")
                    explosion.BlastRadius = 4
                    explosion.BlastPressure = 400000
                    explosion.Position = script.Parent.Position
                    explosion.Parent = game.Workspace
                elseif hit.Name == "NON" then
                    debu = false
                    local ric = workspace.RIC:Clone()
                    ric.Parent = workspace
                    ric.Position = script.Parent.Position
                    ric.Ric:Play()
                    ric.ParticleEmitter.Enabled = true
                    script.Parent:Destroy()
                    wait(0.1)
                    ric.PointLight.Enabled = false
                    ric.ParticleEmitter.Enabled = false
                    wait(2)
                    ric:Destroy()

                end


            end
        end
        local cancollide = true
    end