Blood from the Mouth When Katja is struck in the face, she spits blood out and informs the BLU Engineer that she 'bit her tongue'. Whether she really did bite her tongue or the Engineer actually caused some major damage is unknown.
Farmer's Daughter A strange example, considering she is an intelligent medical school graduate from Germany.
Clean Pretty Reliable Subverted. Fiammetta, suffering from an asthma attack at the time, reacted to CPR by vomiting(on the RED Scout, no less). The only reason it was even done was to keep her breathing until someone came with oxygen and drugs.
Revealing Injury Because the BLU Medic is a male, Fiammetta goes to Katja for assistance.
Not the Fall That Kills You Averted. Logan is knocked out of the Sniper battlement by the RED Spy. He tries to grab at a ledge, ends up breaking his arm, then just dies from fall damage when he hits the ground.