sure thing -- When I wrote that I meant it in a long term sort of way. As in in the middle of a block many people "panic" and do all sorts of things that they think* might help them get out of the block (this is where many speech scientists think that accessory behaviors, like facial grimacing, come from). So, the valsalva might be a block-specific accessory behavior. But now that I think about it there's a solid rationale for an immediate result as well-- The valsalva explanation for blocks has never held any water in my book. I can block in many ways in which the vocal tract remains open. If the tract is open at any location there's no way lung pressure characteristic of the valsalva can increase. The only the valslava explanation makes any sense is when there is a complete cessation of air flow. But then if there's a complete cessation of air flow then lung pressure is going to increase resulting in a valsalva type maneuver. But in this case the valsalva is the result of the block and no the cause. *think is not a correct word here -- but it fits in an allegorical sense. Some accessory behaviors are not conscious per se -- I raise my left eyebrow sometimes when in a block. It's not purposeful, but I don't know that it's subconscious either.