I thought this too, as that is whyAccel said:I always interpreted it that:Rylingo said:Chronicle ending
"How come Andrew is stabbed by a spear at the end when he can shield himself from incoming damage via telekinesis? It's a plothole."
No it's not. The characters create shockwaves by expanding their shields. Andrew sent everyone flying backwards by doing this. This left him temporarily without a shield which is how Matt stabbed him with a spear.
they could create shields instinctively when they SAW something about to hurt them. Every time they shield themselves from something in the film (a fork stabbing or the bus being slammed into them), it was because they saw the other object coming.
Andrew was stabbed form behind with the spear, so he couldn't reactively put a shield up.
The black guy gets killed by the lightning. He wasn't aware that it was about to hit him.