Come across wild boar a number of times whilst in the forces in Germany, I seemed to spend a lot of time lurking in the under growth there, closest call was while I was on my tod walking a forest track, had two sows and two young emerge from the forest 40m in front of me, I just froze as they moved towards me, thick pine forest to either side and about 500m of straight track behind me, "shit" was the only thing that came to mind. Luckily I was facing into the wind, they just sauntered across the track at an angle and disappeared into the forest about 25m from me apparently without ever noticing that I was even there. I think because I'd been out for several nights so definitely smelt O natural and was down wind they just never noticed me, a long 5 minutes though