Originally posted by ketamatic:
You should be using the search engine. There were some long, indepth replies on this subject. Personally, I prefer the foil method.
If you do some research you will also find that the chemicals on the foil when burned have been found to cause alzheimer's disease, not a very good idea.
Holding the hit in is definitley more dangerous than just puffing, but smoking speed is in general the most dangerous way to use it, it is on the same level as injecting it. If you look at the website I am listing, you can read that by smoking it, you are absorbing it into your lungs, which has a direct pathway to your brain, which in turn can get you way more high, but can cause you way more brain damage. see:
http://www.doitnow.org/pages/165.html
This discussion page also talks about the long term lung damage that can happen, so whomever said that it doesn't cause lung damage might wanna do some research too, no offense intended. I've done a lot of research on the subject and from what I've found, eating it is the best "technique". If you are still wanting to smoke it after you do a little reading, i would definitley stay away from the tin foil and not hold it in so long.
http://www.courttv.com/talk/chat_transcripts/2001/0627meth-watt.html