Found this today while reading:
"Einar Schadewitz fought in Munasuo during the Battle of Summa, where he climbed on top of an enemy tank and knocked on the hatch yelling in Finnish:
Open up, Ivan, Death's knocking! For some reason, the crew opened the hatch and Schadewitz immediately dropped a hand grenade through the hatch, killing everyone inside."
-Mannerheim-Ristin Ritarit pg. 229
He was awarded with the Mannerheim Cross during the Continuation War (Knight of the Mannerheim Cross #110)
Einar Schadewitz