Spacetime Wave Pool

All this talk of the LHC possibly making micro black holes has set me a-thinking. If we can make these little black holes, why not use them to warp spacetime for our own personal edification, particularly a wave pool! Imagine a gigantic particle accelerator smashing together particles with enough force to create a micro black hole which will exist for only a fraction of a second before dissipating. If we can get our frequencies down we can create these black holes in such a way as to make waves in spacetime which will then propagate outwards. Outside of the collision chamber of the particle accelerator is a large pit filled with (wealthy) patrons (I mean really, would we let poor people do this?) who will experience the curious effect of warped time, space, and mass. Oh the amusement! For double your pleasure you can set up another particle accelerator who's wave production can be adjusted relative to the first one to create either constructive or destructive interference, giving rise to complex regions of spacetime warping that would make movement across the local area quite interesting indeed!