Tin foil = EVIL.

I can't even recall how many times I've had a bad high due to burning tin foil. It's not healthy, and it always made me feel like shit, which is probably what happened to you.

There are other small things that you can do you get a better high as well, pick out your seeds and stems (good bud will rarely have seeds), if possible, get a bong with ice water, and stay away from smoking aluminum :rasta: