Multiple spellcasting hazards

The wizard's apprentice was disobeying his master. Again. Already in trouble for trying to cast two spells concurrently a few years back, he was back at it. Again.

Progressively, Spell 1 appeared to be advancing rapidly. The ingredients were already sparkling in magickal fire. In comparison, Spell 2 would flicker briefly, then die again, despite the apprentice being much more involved, having started work on it much earlier than Spell 1. He knew he didn't have enough components yet, but in his haste, he believed he could improvise.

Suddenly, he heard a low hum to his right. He whirled towards the source, and was genuinely astonished to see an area of his lab glowing with magickal energy. He hadn't realised that the energy's he was manipulating had activated a THIRD spell. And the sound it was giving off was indeed, very promising.

As he panicked, he thought back in dismay at two of his earlier experiments, and wondered if it was too late to go back and make one of them work He knew one was resolving, but the other...? Guilt started clouding his emotions...

Meanwhile, the entire lab started crackling with mystical energy...