Well this only works for uncircumcised guys so sorry all you cut guys but u know wat this feels like anyway! You will need lube for this.
Get your cock really hard and then lube it up. Use one hand (the one u dont jack with) and pull back your foreskin from the base of your now really hard cock. Now, proceed to jerk off, making sure that your foreskin doesnt move with your hand and u make direct contact with your knob. you can also pull on your sack to make your skin come bak. wen you cum you wont know wat u were just hit by (probably the cum that just squirted that far!!)