That's more difficult than to open a rift.
(Though probably less painful to the ears and body. A portal in space time likely would emit all kinds of odd stuff like wide frequency sound that'd hurt your ears and vibrate the bones..)
"A portal in space time likely would emit all kinds of odd stuff like wide frequency sound that'd hurt your ears and vibrate the bones..)"
Except remember Flash can vibrate his molecules faster than the speed of sound--there was an FR physics thread on this somewhere. . .