Lol. I once went through a police checkpoint. (It was in a car though) I was speeding at night, and since it was Northern Ireland they don't wear reflective gear or make themselves visible (so they are not an easy target for paramilitaries).
One police man tried to physically stop me, but I was going to fast and he had to move out of the way. I slammed on the breaks, like a good citizen. But by the time I had slowed down to 70mph I was already 500 metres away from them and I didn't want to have to reverse back to see what they wanted, so I got out of there, making use of the country roads.