Simplify the following text for a Grade 5 native English-speaking person.
Original: Despite the addition of the chicanes , the circuit was subject to constant safety concerns , mostly regarding the flat-out Tamburello corner , which was very bumpy and had dangerously little room between the track and a concrete wall which protects a creek that runs behind it .
Simplified: Tamburello was very bumpy and had very little room between the track and a concrete wall . The wall protected a creek that ran behind the corner .