A drug-affected driver who seriously injured a paramedic when he crashed head-on into an ambulance in Oldbury has been jailed for 18 months. Walter Ten Haaf, 33, was under the influence of methamphetamine when he drove his Nissan Navara onto the wrong side of Mundijong Road in October 2016 and smashed into an ambulance. Paramedic Wesley Ackerman was flown to hospital with life-threatening injuries, including fractures in his neck and back, a collapsed lung, a severed urethra and lacerations in his liver, spleen and bowel. District Court Judge Philip Eaton jailed Ten Haaf this morning for dangerous driving occasioning grievous bodily harm while under the influence of drugs.