There are advantages and disadvantages to each. You have to decide for yourself which is most appropriate.
With stream or foam, you have to aim at a relatively small, easily moveable target (the head). With a spray, you simply make short squirts (1/2 second or so), while backing up. If he comes forward, he's going to be hurting.
The spray is also easier if there are multiple attackers. The downside of spray is that it won't work in wind and you don't want to use it indoors.
Pick your poison.
Jared
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