Related Clues:

• Eject, as 16-Across
• Eject, geyser-style
• Sneeze, e.g.
• Expel, as lava
• Belch
• Wince or flinch, e.g.
• Flip, perhaps
• Wince, for instance
• Use your reflexes
• Expel in a stream
• Not be deadpan
• Laugh, perhaps
• Be moved by a stimulus
• Do a double take, say
• Jerk or frown, e.g.