> When the circuit is broken, it's current limited.
When the circuit is broken .. by definition, there isn't any current flowing!
You need a loop somehow from one of the terminals of the transformer through you to the other terminal in order to get a current flow.
(There might be some transient effect caused by the inductance of the system within one half-cycle, which may give you an arc as you smash the heater, but that can't continue and is unlikely to pass through you)
When the circuit is broken .. by definition, there isn't any current flowing!
You need a loop somehow from one of the terminals of the transformer through you to the other terminal in order to get a current flow.
(There might be some transient effect caused by the inductance of the system within one half-cycle, which may give you an arc as you smash the heater, but that can't continue and is unlikely to pass through you)