Evanix Air Speed .25 surprise

[Don1fridge]

While shooting my Air Speed for the first time (did not read the instruction manual) I shot it down too low and due to the nature of the mechanics of the semi auto feature it did a valve dump. Much to my surprise on my 4th full mag after the 3rd shot there was a sudden Braaap and the gun emptied all the remaining air in the air tube ~1500 psi to zero in about 4 seconds. SWMBO was upstairs and I was in the basement at the opposite end of the house. the dump was loud enough to alert her that something unusual had just occured annd I was sitting there with that "What just happened" look on my face.