If I may.
It was too late when Mjolnir has crashed with Tesseract, sending it flying from Loki's strong hands; ultimately freeing his mind from its grasp. He saw everything, he simply couldn't control his body when an old relic was connected with his consciousness he was a prisoner of his own body, locked in the depth of his being. Another blink and he was in control again- the ruins, destruction and his brother on the ground becoming painfully apparent. As Thor has thrown his weapon to disarm Loki, the ray from Tesseract has pierced his heart. Loki dropped to his knees, praying to anything that would listen for his brother's life. Thor was not breathing, his skin felt cold to the touch. Panicking, he lifted his brother onto his shoulders, carrying him away from the battle. Picking up Mjolnir was an afterthought. His king would not be buried without his weapon; he, Loki of Asgard would see to it even if it was the last thing he would do.