This article quotes Joe Smith of the pro-Palestinian International Solidarity movement who describes how Rachel Corrie and her fellow "activists" would confront IDF bulldozers:

Smith, originally of Kansas City, Missouri, .... said the fact that the IDF had previously taken pains not to hurt the group made him feel safe. It is precisely because the group has so much experience playing a game of chicken with the bulldozers that it understands this was not an accident.

Many members have stood in front of a bulldozer as Corrie did and then climbed up the mound of dirt, precisely so that the driver could see them. "You look into their eyes and they stop," Smith said.

So the ISM itself admits that Corrie deliberately jumped in front of the bulldozer, confident that it would stop because IDF bulldozers have always stopped in the past.

But in fact it's obvious that the driver must be considered guiltless until there's serious evidence to the contrary - just as any driver would if someone jumped in front of his vehicle.