I took a field trip to Chicago's Museum of Science and Industry about 3 weeks back, and there were 4 buses. My friend (his mom was a substitute) got in trouble so he cancelled, so our other friend did it, and we were bumped back to the worst bus. There were no seatbelts, it was a 2 hour drive.
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Even buses need seatbelts.
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Or safety harnesses
there are no seatbelts AND the road is bumpy