Pink flowers with popping seeds

I received a few seeds from a tall specimen with pink flowers. Towards end of growing season when plants go to seed. The seeds develop in groups and "pop" when touched or ready creating a unique sound.

The plants are between 4 & 6 feet tall.

Any clues, or help (name, sun exposure, etc.) would be great!

Thank you in advance.

 

Looks like Impatiens glandulifera. Common name Himalayan balsam.See....


http://en.wikipedia.org/wiki/Himalayan_Balsam

 

Thank you very much! I do believe this is it!

 

This is an invasive weed, please see....

http://www.shim.bc.ca/invasivespecies/_private/himalayan_balsam.htm