Dave Jensen and Lee Strunk get to the point where they trust each other pretty well. They make a pact that if one of them should get a wound so bad it would put them in a wheelchair, the other will kill him to put him out of his misery. They even put it on paper.
Of course, Lee Strunk eventually steps on a rigged mortar round and it blows his right leg off at the knee. He begs Dave Jensen not to kill him. Dave Jensen says not to worry – he won't be killing his friend.
Strunk doesn't believe him, but Jensen does as he was asked – he doesn't kill Strunk. Strunk dies as he is being airlifted out. It "seemed to relieve Dave Jensen of an enormous weight" (Friends.13).