if you're rolling a joint in a hurry, you're not doing it for the right reasons.

for those rolling joint rollers, they usually have a moveable axle...one of the dowels will shift position so you can put the weed in, then shift back so the weed doesn't pop out the top. I usually roll it several times before I put in the paper, and make sure you know which way the paper will pull so you put the sticky on the proper side!

and I personally find it much easier to put the filter in after the J is rolled...makes a better fit IMO