20 Things You Somehow Missed In X-Men
4. You Can Totally See Toad's Safety Harness
During Toad's (Ray Park) fight with Jean Grey in the third act of the movie, he spits green slime in her face while she's holding him in the air, causing her to drop him to the ground.
But as he stands to his feet in the very next shot, the stunt rigging is quite clearly visible on Park's right side for about a second.
Whether this was missed in editing or simply a cost-cutting measure - because why paint out wires most people wouldn't spot anyway, right? - it's impossible not to see it once you do notice it.