OK do me a favor all you quick shooter (

) take a syringe, fill it with water and now push out the water at the same speed you normally would. Remember water is thinner so it will not come out as hard as your gear.
OK think about this, that stream that is shooting 5 ft in the air where is it going? It's up tight against a muscle (hopefully) so there is even MORE pressure behind it.
Let it go out SLOWLY so it has somewhere to go or your are just shooting that hard fast stream into the muscle. Of course it's gona hurt.