Drive (2011)

In Nicolas Winding Refn's crime drama about a Los Angeles getaway driver in heists:

• the scariest scene was a lengthy, slow-motion elevator scene (it was descending from the 'driver's' apartment to the garage basement); unnamed stunt Driver (Ryan Gosling) and his single-mother neighbor Irene (Carey Mulligan) kissed; when he noticed the third occupant of the elevator, thug Nino's (Ron Perlman) hitman (Jeff Wolfe), had a concealed weapon in his tan-colored coat, Driver violently confronted the assassin, threw him to the elevator floor, and beat him to death
• the brutal sequence ended with fifteen vicious head stomps delivered by the Driver's heavy boots; Irene exited the elevator in horror and terror

Vicious Head Boot-Stomping