The "mouse" is nothing more than a ceramic canister within his SS tube full of (most probably) MgH and Ni acting as a catalyst to brake the released H2 to atomic from its solid state MgH at high temperatures. If H or Mg are in contact with air or moister then a Lungmuir toarch reaction (reaching 3400C) and/or a violent reaction of Mg with H20 give such "explosing" results lasting for some seconds. Such are not desirable results but accidents due to poor controllability.
-- Daniel Rocha - RJ [email protected]

