MyQul
Chairman of the Bored
I added about 3/4 pint of water & 5 tablespoons of DME (not massively heaped but definitely not level). When I arrived home there was a few mm of light coloured solids at the bottom, I have shaken this back into suspension and if foamed quite vigorously.
If I recall correctly the original smack pack contained only a small amount of liquid and with the yeast in suspension, which it was stated could be added directly to the wort.
By the sounds of things you've got quite bit there. Stick it in another 2L (2L water/ 200ml of DME) of starter nd you'll have loads to get to restarted with the strain again