balloon animals

I bought (for no real reason) a bag of modelling balloons, they have this wonderful puffer upper thingy.... No Lewis you cant have it for the camera lens!
And instructions.

So you blow up the balloon and you tie a knot and
You bend it...yep so working
twist it and BANG
ok ok
so you blow up the balloon and you tie a knot and
ppppppppfffffffffffffffffffffffff a hole in it
ok ok
blow up balloon, tie a knot
bend it and BANG

I give up
send in the clowns!!!!!