though most will not do make the r in markt as hard as Germans do.

Most German dialects (including standard German) barely pronounce that r. It is noticeable, but far from a “hard” pronunciation, in that case i is more like prolonging the “a” sound.

I once accidentaly shorted the connector cables of a battery pack with 4 AA batteries. It very quickly generated enough heat to set the insulation of the cable on fire.

Don’t underestimate short circuits!