Bundle, Grasp
Put your fingers on the bed, grasp the sheets and bundle them up. Now you can do the laundry!
Imagine pressing your fingers into the bed, grasping tightly and ripping the sheets free. Then you bundle them up into your arms so you can stuff them into the washing machine.
は, わ
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In between grasping and bundle-ing, you shout HA (は)! That's when the sheets come off the bed.
The next time you grasp your bedsheets yell "Ha!" as you yank them off. Now chuckle a bit, ha ha ha, as you bundle them up into a ball. You can't beat me, bedsheets.