I seem to remember there was one point on HL when you are in a pipe and a Grunt chucks in a satchel, and it explodes, sending a flame down the tube - so it must be able to be done. I have checked most of the tuts on this site and have experimented myself but I cant seem to get it right.
Any help would be appreciated
![:)](http://192.241.182.11/images/smilies/smile.png)