When he had half the minute left, by his best guess, Draco shot out his hand and sent a weak wandless spell to break some of the undergrowth and create a gap between the tightly packed bushes there. A quick glance to make sure it looked suitably disturbed, and he slipped carefully through the bushes headed in the other direction. Hopefully Granger would catch the manufactured gap and assume six-ish feet of out of breath wizard had gone that way.