While racing a Shields on a broad reach, we inadvertently got the spinnaker sheet on top of the boom. While there, the sheet rode naturally upwards of five feet higher and a few feet further outboard than it would have if it had been in the usual orientation under the boom. The open-leech, outboard-lead configuration seemed quite fast. In our neck of the woods, this approach is at least pretty darn rare and I don't recall seeing it before. The web doesn't say much about it, other than it's not recommended because it limits motion of the boom. Thoughts or observations about sheeting that way on purpose?