"Thumpversion" is more commonly called a "precordial thump", and there's very little evidence to support its use. You're much better off doing chest compression

"Thumpversion" is more commonly called a "precordial thump", and there's very little evidence to support its use. You're much better off doing chest compressions until an AED is available. There is practically no evidence supporting his "recommendation" that the police use it routinely (if it doesn't delay CPR, then sure, give 'em a punch in the chest, but the evidence behind it is _very_ shaky).