How to avoid a conversation! (impolitely)

source: EnglishLessons4U - Learn English with Ronnie!   2014年3月31日
http://www.engvid.com/how-to-avoid-a-...
Tips:
1, Don't ever make eye contact with anyone you do not want to talk to.
2. Don't ask the speaker any questions.
3. Look at something or someone else.
4. Talk really fast or "mumble" so that the person cannot understand you.
5. Make strange facial expressions / body language.
6. Use slang/words that the others don't know.
7. Use an angry tone of voice.