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