The 20 minute physical activity I performed was doing yardwork. It was fairly easy to do, besides a lot of bending down involved to pick up sticks. I did it in my front and backyard for a bit over 20 minutes, and no one did it with me.
The drug can be laced and made poorly. You never know what is put inside of it because it is not a law in the U.S. to tell your buyer what is put inside of it unless they ask. Also sellers of ecstasy usually are not selling what they tell you. Most of the time they are selling you MDMA.
Yes it can memo and e mail are the best way to communicate
Kidneys remove excess water etc.
