If solo, give the victim a normal wedgie then spin the around and give them a frontal wedgie, then if you like you can pull up the sides as well.
We captured a few of our own.
If you use something like tape or a stick that is just short enough to have the sleeves hang over the ends, this can be an incredibly hard wedgie to get out of next to a hanging wedgie or hogtied wedgie.
Have the victim do the splits, while they are down thread the rod up one of their pants leg and out the other.
Finally loop the leg holes over the ankles.
Once the underwear is done freezing the victim is wedgied in them until they thaw out.