What makes a thriller introduction successful:

Initial idea's on what makes an opening/introduction to a thriller so successful:

• Mystery/Intrigue
• Possible cliffhanger
• Clever and effective editing
• Good/steady camera shots.
• Appropriate lighting/dress/props
• The abililty to "hook" or "engage" the audience, so they're interested in the rest of the film
• Good use of the mise-en-scene - Effective
• Originality/Individuality
• Effective framing, compostion (rule of thirds)