Complex sentence: During the dance, Parker realizes Toomes is planning to hijack a D.O.D.C. plane transporting weapons from Avengers Tower to the team's new headquarters, dons his old homemade Spider-Man suit and races to Toomes' lair.
Split into simpler sentences: During the dance, Parker realizes Toomes is planning to hijack a D.O.D.C. plane transporting weapons from Avengers Tower to the team's new headquarters. He dons his old homemade Spider-Man suit and races to Toomes' lair.