|V: Breakout (1985) [Isaac Henley]: Eaten by a sandshark as he walks across a sandpit in the Visitors' concentration camp. (Thanks to PortsGuy)
The Twilight Zone: Take My Life...Please! (1986) [Dave]: Killed in a car crash, along with Tim Thomerson, while Xander is holding Tim at gunpoint in the car. The scene cuts away before impact, before the story resumes with Tim in the afterlife. (Thanks to Andrew)
Straight to Hell (1987) [Preacher McMahon]: Shot to death by Dick Rude and Joe Strummer outside the town.
Walker (1987) [Byron Cole]: Hit on the head with a rock by a villager when Xander tries to steal a horse during the revolution. (It was difficult to tell who was who in all the chaos, but I think it was Xander in this scene.)
L.A. Takedown (L.A. Crimewave; Made in L.A.) (1989) [Waingrow]: Knocked out of a window by Scott Plank. (Thanks to Gary)
The Last of the Finest (Blue Heat; Street Legal) (1990) [Fast Eddie]: Killed by an assassin. (Thanks to ND)
The Rookie (1990) [Blackwell]: Killed when he crashes his plane while trying to kill Clint Eastwood and Charlie Sheen. (Thanks to Neil)
Short Time (1990) [Carl Stark]: Falls to his death from a window-washing platform at the end of a fight with Dabney Coleman. (Thanks to Johan)
Not of This World (1991) [Bruce MacNamara]: Electrocuted by the alien when he gets into bed, not knowing the entity is already under the covers. (Thanks to ND)
Terminator 2: Judgment Day (1991) [Todd Voight]: Stabbed in the mouth by the T-2000 robot (in its Jenette Goldstein form) in his kitchen, when the T-2000 transforms its arm into a spike. (Thanks to Tal and Adrian)
Candyman (1992) [Trevor Lyle]: Slashed to death with a hook by Virginia Madsen in his bathroom, after he inadvertantly summons up her ghost by saying her name five times in front of the mirror.
The Gun in Betty Lou's Handbag (1992) [Mr. Marchat]: Stabbed in the head by William Forsythe. (Thanks to Gary)
Dead to Rights (Donato and Daughter; Under Threat) (1993) [Russ Loring]: Shot to death by Charles Bronson, after Dana Delany breaks away from Xander while Xander is holding her hostage. (Thanks to Nadine)
Poison Ivy II: Lily (1995) [Donald Falk]: Falls out of a window during a struggle with Alyssa Milano.
Within the Rock (1996) [Lonner]: Mauled to death by the alien. (Thanks to ND)
Air Force One (1997) [Secret Service Agent Gibbs]: Killed when Air Force One crashes into the ocean. (Thanks to Eric)
Universal Soldier: The Return (1999) [Dr. Dylan Cotner]: Killed by Michael Jai White. (Thanks to Nick)
Shanghai Noon (2000) [Nathan Van Cleef]: Shot to death in a shoot-out with Owen Wilson in a church. (Thanks to Tony)
24: Day 2: 10:00 PM-11:00 PM (2003) [George Mason]: Killed in an explosion when he deliberately crashes the plane carrying the terrorists' bomb into a "safe" unpopulated area of the desert. We see the flash of the explosion after Kiefer Sutherland parachutes to safety.
Drop Dead Sexy (2005) [Harkness]: Shot in the chest by Joseph D. Reitman, after Xander shoots Pruitt Taylor Vince.
Year One (2009) [King]: Stabbed to death (off-camera) by Vinnie Jones and the other guards. (Thanks to ND and Arben)