No Wobbly Knees
1935: In Germany, special schools were set up as the SS was expanded from a personal bodyguard into a fighting force. Training was rigorous. At the Bad Tölz school, an officer cadet might be ordered to pull the pin out of a grenade, balance it on his helmet and stand to attention while it exploded.
Source: Gerald Reitlinger, The SS: Alibi of a Nation 1922–1945 (1956), p. 78