"Stupid Tough"...... Bullet sponges. If you don't hit them right, you are going to be pulling it out of a lake.
Not sure what stupid tough is. Most went down with a good shot. Up here they are extremely wiley and considered very smart.
And I did pull one out of a creek after a bad shot followed up by trying to hit one running full speed at 400+ yards. One shot took out a rear leg at the joint and he ran 3/4 of a mile through the woods. No idea how he kept going as massive blood loss (none inside when we skinned him out).
Last gasp was to jump up from the bank of the creek and jump into it. Made for a fun night.